Just got mine about 2 and a half weeks ago, and I am still just as impressed with it as I was on day 1, I can't put it down.
Pros:
-Highly customizable
-Android OS is awesome and lots of potential
-Android 2.1 on the way
-Beautiful Design
-Nice camera
-Tons of useful apps
-GPS (available turn by turn navigation as well - have tested it and ended up giving my old TomTom to my parents; using Copilot)
-Web browsing is excellent, very fast on both 3G and wifi
-Battery is about average to above average for a smartphone
-Syncs my calendar, email, contacts, everything is well organized and has improved my organization since having it
-MULTITASKING! Have a few web browsers open, pause Robo Defense to check your email, go on Twitter, all while easily switching between them
Cons:
-Sometimes the UI gets a bit sluggish, but not a deal breaker in any way and generally taken care of using a task killer
-Wish the camera had flash, my gf's bb storm2 has a nice flash on it
This is a great phone all around. I couldn't be happier with it, easily the best phone I've owned and both HTC and the Android OS show incredible potential for the future.