I felt that this thread is worthy of my first post
After pressure from a friend, I switched from the iPhone 4 to the Evo. I always hated on Android phones because of the battery issues I've had in the past with them when I first had one (first Android phone was a Hero). I learned, once I got the Evo, that I just didn't know how to use an Android phone.
In any case, I loved the Evo when I switched. The stock ROM I used ate battery, no matter what I did. I rooted and put CM7 on, and that made a difference. I also purchased an extended battery for the phone from Sprint. I usually got a day and a half to two days of actually using my phone. It was great, however, I was carrying around a brick. The phone was huge, the back was now huge, and I wondered what's different that this Evo I'm using, and a Galaxy tablet...
I switched to the Shift over the weekend. It's completely stock. The battery it comes with easily gives me a day of actual use. The keyboard is AMAZING (I love swype, but nothing beats a hardware keyboard). The keyboard shortcuts like .com are really convenient. Little things like that greatly affect my perception of the phone. The camera, even though 5MP, seems just as good as the Evos. As I stated, I'm used to an iPhone, the form factor of the phone is great. It doesn't bother me in my pocket, and feels good in my hand, whether just using the screen or the keyboard. The phone is SNAPPY! No lag what so ever. I noticed with my Evo, sometimes when sliding to unlock, it would get stuck, etc. I have not had this phone lag on my one bit. I can't express how much snappier the OS is. When opening/closing apps, when sliding screens, everything just feels so much more smooth than the Evo.
The only cons I have about my phone is that when using the keyboard, the screen feels like it wobbles a little. Also, the placement of the volume rocker seems silly to me. When closing the phone, I notice that I hit the volume rocker a lot (my fault really).
This, to me, is the BEST Android phone I've used. I've heard that if you purchase a case for the phone (most people prefer the Seidio), it negates the "wobbling" issue. I think I'm going to exchange for another Shift if the case doesn't fix it.
Hope this helps. I'm glad to answer any more questions