Got to try one out at a local Best Buy in Illinois yesterday, so I will give my brief impression.
Comfort -- First thing I noticed is just how comfortable this headset truly is. I have only used a Gear VR and a strap-ified Google Cardboard in the past. I haven't tried the Rift or the Vive, but you can rest assured, having the weight of the headset rest on the top of your head instead of your face is completely superior in every way. You can probably wear this thing for hours on end without issue, something that I cannot say about my Gear VR.
Display -- While the image is not as sharp as my Galaxy S7 Edge in my Gear VR, it is still enjoyable to look at. Text can be a bit blurry and difficult to read in some instances, but that could be attributed to foggy lenses or the impromptu placement of the headset on my skull. Either way, the resolution will not hold back this device from providing convincing VR experiences, and I am very pleased with what I saw. I will make note of one other thing, and I hope others can chime in, but the image brightness seemed somewhat low on my demo unit.. It may just be that I'm used to the super-bright AMOLED display of the Galaxy, but I figured it's worth a mention.
FOV -- The FOV of this headset is very nice. Having moved up the ranks from Carboard - Gear - PSVR, I can appreciate that I do not get the "ski goggle effect" that I get with the lower tier headsets. Not much else to say on this subject, but I do not see any cause for concern regarding FOV issues.
Gameplay -- I got to play Battlezone, and I had quite a good time with it in my brief 10 minute adventure. The cockpit was very detailed with bits of info scattered about, and the general aesthetic of the game was very vibrant, and very energetic. Will definitely pick this one up on release.
Final Thoughts -- After trying out the headset, I think I will be keeping my pre-order. With the pure comfort of the device, coupled with the extensive support of developers making awesome games and experiences, I can see myself spending tens of hours inside these virtual worlds. I am confident that PSVR will remain a staple in the Playstation line-up.