What's funny is I actually use to have a Palm Treo and I feel like I stopped being able to text even remotely efficiently ever since I switched from that to my first iPhone.
Probably just a me problem, but I feel like I've never been able to get any good at typing on a screen keyboard no matter how long I do it.
That said, I may consider this just for the fact that I won't have to retype/correct every other word in a text lol.