I have really become used to UberTwitter having their replies and direct messages all in one timeline. From the pictures it sorta looked like this app is more similar to TweetGenius. I might end up sticking with UT.
I have to admit, for me twitter is more a toy than anything else, so if I can have UT for free, why would I pay, unless the app is just amazing? The screenshots look goo, but I'm not sure that they're that good. Guess time will tell.