Love it, but it isn't perfect (for me). I read a fair review on Engadget yesterday that's pretty much spot on (again, for me). (
HTC Thunderbolt review -- Engadget)
Love the speed, the design, the SPEED. It's super fluid, and the display is awesome.
Have some quirky issues with SMS, battery life isn't awesome, hate the preloaded bloatware that I want to remove after I root it.
If you want to be on the bleeding edge, you have to prepare yourself to bleed a little

I bought the TB on the day it launched, just like I did the OG Droid 2 years ago.
So I really recommend the phone, I really think it is a step above what I had and especially since it looks like the developer community is starting to ramp up.