I've had mine 4 days. ...no problems so far. Well, one slight one. Yesterday, I was receiving two phone calls, at least one voicemail, and a text -- all at the same time -- while I was trying to make a call. The phone lagged a little.
I love the PenTile display. It's easily readable in full noonday sunlight. Yes, there is a texture on some still images in certain solid colors (sky blue and light green) that is just barely at the limits of my perception. ...but I'll trade the full-on sun readability, and slightly better battery life, for pixel perfection any day. If you aren't looking at the display side-by-side with a non-PenTile screen, and you aren't looking explicitly for it, it's not there. When it is there, it just doesn't bother me. It's a phone, not my primary entertainment device. There are necessary compromises, and the PenTile seems to hit them about right.
While I'm on the subject of the screen, does automatic brightness work on other Android phones as perfectly as it does on this Photon? The automatic brightness on my laptop is awful! I never even see it working on the Photon. It's just always the right brightness.
I looked at the 3Vo. It's not for me. Sense is nice, but after almost 3 years with a Touch Pro, I'm soured on HTC. All that eye candy just unnecessarily drags down the phone. If the Galaxy S2 comes out in the next 25 days, I will definitely consider a swap. But that S2 will have to be something totally spectacular to get me to trade my Photon for it.