My 2 cents.
Hi there, new HTC Evo 3d owner here. Since my local store has gotten these babies in stock, i had to snag one.
I am kind of a nut when it comes to phones, and all my phones that ive had are all day 1 purchases.....hahahaha its like my birthday everytime a new phone comes out.
Anyhow, im coming the HTC thunderbolt (which is still active) and i must say the evo is really snappy!!! (duh cause of the 1gb ram and dual core processor). I havent had a lag on this phone yet!!!
The screen is really vibrant but different in scaling as the evo is 16x9 aspect ratio. And texts seems to be nicer on the evo.
3d camera i thought was just a gimmick, but its really cool!!! but not as practical as i would think it would be. But 3d youtube videos are pretty sick too!!! Only thing is, you have to hold the phone at a certain angle to get the best pic quality......
GPS locks in instantly (tbolt is still suffering from gps lock issue!)
Screen is responsive, and sense 3.0 is really cool!!! love the quick launch from the lock screen feature.
Sprint 4g is hit or miss in my area though (OC California). I stop at the next stop light from my house and the 4g scanning notification would pop up already......and it would do that since the coverage here isnt so great.
Battery life is really good, considering i have 4g on all the time (usually in search mode ahahaha) and gps is on all the time as well. 40% 13 hours since unplugged, 2.5 hrs screen time.
All in all, the phone is great, even if youre skeptical of the 3d gimmick. If youre looking to get a killer phone for sprint, this is one of them. But in my case, i cant give up my unlimited LTE plan yet from verizon.