Ive played several of the iPhone poker apps and this is far and away the best one. It has a ton of customization features, including number of players so you can play MTTs and STTs, cash games, and Shootouts, blind level increase speed (for the "Turbo" junkies), the actual in-game speed and animations can be tweaked for super-speedy play, and Theta Poker can be played in Portrait or Landscape with a continuous overhead view. You can gear the game to how you WANT to play. The AI is pretty good, though I will say I beat it often on the Expert level. There really is no substitution for play against real people, but this is a great time-occupier and quite good practice.
My only requests:
Complete customization of the blind levels as opposed to only "Very Small" to "Very Large" and Id love to see a Career Mode!
Wallatz about THETA Poker - Texas Hold 'Em