I went from QWERTY (6710) to SureType (7100t) to QWERTY (8700g) to SureType (7105t; my 8700 was stolen Friday, so this is a loaner until my new 8700 comes in). I can honestly say that SureType takes more focus (you can't just touch-type - you have to look-and-peck, or simply type-and-look-and-correct). It does a great job with learning most commonly use spellings and adapting to your typing styles, though. I prefer the full QWERTY keypads, though. I thought it would take a bit to get re-adjusted to the 710x keypad, but it took all but zero seconds for me to start typing like a champion on it once again.
In the beginning the Universe was created. This has made a lot of people very angry and is widely regarded as a bad move.