I haven't bought the app yet (it's 3$ I think) but I'm really close. Being able to go on this or other forums from my phone seems like a great idea to me.
When using my phone to post I don,t change my answers or the way I answer, maybe I'm too old to talk like that (I hv airguns 2- OMG! i C u do 2). To me the point of getting a phone with a large screen and a full keyboard was to type full words and not have to press the same button 7 times (because you do it too fast the first time and you have to start over).
But there seems to be other applications that are similar to tapatalk that you can get "lite" (free) versions to try out and see if it suits you.
What seems interesting is being able to take a few pics with my phone and post them right away without the need to go thru picasa or other hosting sites.
I don't know, I may be the exception but I won't shorten my comments because I'm on my phone (even if it's an old iPhone 3Gs).