I've long been a fan of SureType, and highly recommend that any who are thinking of trying it go to a store and test use the phone for themselves.
While there are folks that just have to have the full keyboard, I find that I'm not one of them. The size and sheer usability of the SureType keyboard far outweigh any supposed advantage of having a keyboard with 1 letter per key.
At first, I like many thought I would never get used to ST on my 7130e, and then (overnight it seemed like) I was flying through whole e-mail messages in no time at all. In fact, with my Verizon Pearl, I often reply to e-mail on my phone rather than fire up the laptop because I am every bit as fast on my Pearl with SureType as I am on a laptop keyboard. And with my 8830 for example, the keyboard layout and phone design were just too small and cramped for me to really consider it useful.
But again, I would highly recommend any who are considering it to try it out before buying. You'd not have to look far on these forums to find a great many folks who are faster on SureType keyboards than they are on full QWERTY. So there must be something to it, yes?