Having owned and used the Pre+ for nearly two years before getting my Pre3 (vzn), I was very impressed with the comparative quality of the phone.
The keyboard is very responsive and big enough for me - I actually started texting some (old guy here), whereas the Pre+'s keyboard was so hard to use (letters repeating or not registering) that I just used the keyboard as infrequently as possible. I have noticed just the slightest amount of "oreo-ing" with the keyboard. Not nearly as much as the Pre+ (and that I would classify as minimal).
The display also is very impressive - even after using it a year, I am sometimes caught off-guard by how crisp it is.
Regarding the size - for me it is just right. Any bigger and I would not be able to "one-hand" all the touchscreen swipes and reach the corners. Since I also opted for getting a Touchpad, I don't feel like I need a bigger phone for the screen size.
My battery life is acceptable, with minimal use I can go almost two days. With more heavy use, I'm good for most of the work day, sometimes charging it just before hitting the road home.
The camera is good for what it is - an addition to the phone. I do wish it had some zooming capabilities, though. The front camera is fine for skype use.
GPS and wifi signals work without problems.
I thought that I would use touch to share more than I have (works well, though).
I have been able to get some limited international GSM connections on this CDMA "global phone"
Other components - switches, speakers, mini-usb plug - no problems after almost a years use. I think the ringer switch is much better compared to the Pre+. No problems with scratches on the glass - even with no screen protector or special carrying case (it goes in my pocket).
All in all, it is the right size for me with sufficiently quality hardware components, that they remain "in the background" as they should.
As a note, had hp supported this and been able to work out a few of the bugs (GSM support in the CDMA models), this would have been and outstanding phone. As it is, I have no reason to switch to anything else at this time.