Pros:
Large Display
Great on screen keyboard
Good Camera
HSPA+
Duo-Core
Great for gaming.
Easy to root

Cons
Plastic body easy to scratch
Low pixel density
Speaker phone sucks
Battery won't get you through a day with heavy use
Design is nothing to brag about
ICS update?????

I wont get into too many details on my review, I would just say the T-Mo GSII is not ground breaking nor revolutionary device but I can say this device is a freaking solid device to have, it does everything well and fast without a lag. I gave it a 7 for the simple fact that Samsung wont be supporting this device with any android updates after a year, so if your like me and change devices every year or don't mind waiting for ICS or prefer rooting than waiting this might be the best device for you. If you want android updates for 2 years you might want to save up a few bucks and go with the Galaxy Nexus GSM or might wanna give Windows Phone 7 a try.