TL;DR I got my Frame a day early, and it has its ups and downs.
I was a day 1 reservation and got my order email last Friday, and it arrived today. Already had mods printed out for it and accessories purchased, so I haven't experience a stock Frame at all.
Mod: I printed the Steam Frame Battery Add On v2 out of PETG and then used 3M Command Strips to stick a BOBOVR PD100 to it so I can use the B100 batteries I have for my Quest 3. Also printed Steam Frame Controller Wall mount and Steam Frame Wall Mount to hang them on the wall next to the Quest 3.
Accessories: Got the ergo kit (was in stock when I ordered the headset), Zenni inserts, and an Arcturus Vision Camera.
First experience: I was only in it for about an hour and my head started hurting and had to take it off for a bit. Realized when I took it off that I had it WAY too tight on my head. With that top strap, you can loosen it up quite a bit and still have it stay nicely for less intense games (American Truck Simulator, Beat Saber, Walkabout Mini Golf). After about an hour with it off, my head started feeling better and I tossed it on again. Played for another 2 hours without any issues and was rather enjoyable.
For standalone, I played some Hades 2, Beat Saber, and Walkabout Mini Golf. All of it ran nicely, and the 2 VR games I took the resolution up to 2160p and 144hz and it was smooth. For Hades 2 I did lowered it to 90hz since the screen was kind of "jittery" when I moved my head a little with it at 120hz.
For PCVR, it was a simple setup. Just plugged the dongle in typed in the pin and it was good to go. Was a little finicky at first, but found streaming SteamVR with no game running THEN launching a game was more successful. The first thing I did was try some 2D streaming and picked Forza Horizon 6, and it was kind of a letdown. I don't think I had set the bitrate manually yet to 350mbps, so I was getting a lot of artifacting and it didn't look that good. Ran smooth and if I sat still in a car, it sharpened up.
As far as the gaming, I really wanted to see how American Truck Simulator looked since that is my go-to relaxing game. Just drive around the country in a big rig in VR with a wheel. Unfortunately, I will have to say, ATS in VR on the Frame can't hold a candle to what the Quest 3 can do with Virtual Desktop. I'll tinker around with settings some more tomorrow to see if I can get the image to sharpen up and not be so blurry (looks like low graphics settings and not low bitrate). I have my settings pretty much maxed out, set to 90hz, and have the bitrate set to 350mbps, but it just looks BAD.
On the other hand, I tried Bigscreen, No Man's Sky, and Beat Saber over PCVR as well and they looked PERFECT. No noticeable artifacting and was butter smooth, so I don't know what is up with American Truck Simulator.
The controllers are kind of a mixed bag for me right now. I'm 6'5" and have big hands, so seeing all the reviews of people saying the controllers are big, I figured I would be fine. Well, they are "weird" as of right now for me. They fit in my hand, but the ergonomics of the controllers are not that great. I have to move my hand in strange positions to be able to hit all the buttons. I'll probably get use to them over time, but right now it feels cumbersome to use.
For the PD100, it can put out 30w of power. Come to find out, that is more than enough to keep the Frame fully topped up constantly. I was downloading games and updating the headset for the first bit and the charge percentage never went down, only up. After it fully charged and doing PCVR and standalone VR, the battery never went off "Full" until the battery pack died, which I just popped the dead one off and put on a fully charged one and it was back to "Full" in less than 10-20 minutes. I do need to download Half-Life Alyx and see if the PD100 can keep up with that. I'll get back to you guys on that one tomorrow or this weekend.
The "bad" stuff: Sorry I have to do this, but it needs to be said, and I experience a lot of the stuff other people have.
Firstly, the lenses just aren't anywhere near as good as the Quest 3. The sweet spot is a lot smaller, you get distortion towards the edges, and I notice a weird lensing effect when looking down (don't know if it is normal or not, but didn't notice it too much once I was paying attention to the games). My IPD is 63.2mm and that is what I have it set at on the headset.
The Arcturus Vision Camera passthrough falls short of the Quest 3 passthrough. I can easily read my phone withe Quest 3, but not with the Arcturus. You can easily do stuff around the home without any issues, but the fine detail just isn't there. Overall, it is a good accessory and I'm glad I bought it as I got spoiled with color passthrough with the Quest 3, and I still have it with Frame now.
I'll mention the controllers again since I think my cumbersomeness with them would be amplified with people that have smaller hands. I completely forgot that there was the "Start" and "Back" buttons since even with my hands it was hard to reach them.
The software/OS...I'm going to give this one a pass since it is so early for the Steam Frame. I know with how far SteamOS has come on the Steam Deck over the past few years, the Steam Frame will just keep getting better and better. My BIGGEST complaint I have, why isn't pointer the default scheme? It defaults to controller scheme EVERY TIME and have I have click the grip button to switch it to pointer. If there is an option to change that, I haven't found it, so please tell me where it is. If that option doesn't exist, Valve, please add it. using the D-pad and ABXY is weird and I like pointing and clicking to navigate.
Controller tracking is pretty good for everything I tried...EXCEPT Walkabout Mini Golf. The way you hold the putter, the controller kept losing tracking and moving down in game on its own. Had to hold the controller up towards my chest for it to track again and I can putt. I tried holding my thumb in different spots just in case I was covering up a few of the IR trackers, but nothing stopped the lost tracking. On the Quest 3 I kind of have the same problem, but it is only when I hold the controllers down at my side for a little too long and none of the cameras can see the controller (remember, I'm 6'5", so those controllers are a long ways away when at my side, lol).
Conclusion: I thought that as soon as I got the Frame that I would instantly fall in love and sell the Quest 3, but that is not the case. The Quest 3 is firmly staying until things smooth out in SteamOS on the Frame. American Truck Simulator is enough to keep the Quest 3 to just play that. After the first hour and the headache, I thought that I was going to have to sell the Frame. Thankfully when my head felt better I put it on again and got away from that thought and it turned to "this thing has some potentially, I can't wait to see where it goes from here". I don't have buyer's remorse, and with my tinkering side, I think I can have some good fun with this headset over time as I learn more about it. If I HAD to choose one of them right now and HAD to get rid of the other one, that would be hard, but Virtual Desktop on the Quest 3 would win. Now if the developer of Virtual Desktop brought it to the Steam Frame, bye-bye Quest 3! I would gladly pay double for Virtual Desktop ($24.99 on Meta store) on the Steam Frame if it performs and looks as good as it does on the Quest 3 version.