Ive had several full qwerty phones and it took a bit of time to get used to the iPhone but I can type just as fast if not faster on the iPhone. The trick is letting the auto correct do its job. When I first got the phone I would fix each typo as I typed them and that was tedious. I send and receive around 5000 txts a month so I spend a lot of time typing and now I just type as fast as i can and more often than not I dont have to fix anything by the end of my txt because its all been corrected automatically. I dont see this app being any easier or quicker than typing normally, at least for me.