Let me start by saying that this phone has the best battery life of any phone I've ever owned. I say that first because it's important to me. I text/twitter/facebook a LOT, so I need a reliable battery life. This isn't my first BlackBerry, I had the Curve 8320, and went to a G1 (and back to the 8320 because, well...).
In my opinion it's a total upgrade from the myTouch from the hardware, to the polished OS with zero lag, to the battery life and don't even get me started on the trackpad.
Sorry, I'm oozing. In a word, this phone is amazing and yes, you should get it!