I bought this game last summer, in order that I could have a poker fix on the road. I was largely very unfufilled in my quest to get a poker fix out of this game. The tournaments are a series of 6 handed all in fests Most start with around 50 players and it is extremely easy to win because most AI players will call your all ins with Ace high or middle pair.
Most people play poker because they enjoy the competition involved in trying to out manouver several other quick thinking and strategically minded opponents. I am unaware of anyone who has realistically emulated this experience, game researchers have tried and failed to develop software that can beat the top pros or even decent players. This game is no exception to the rules that this research has found, and that is it takes a thinking human opponent to beat another thinking opponent. In credit to this game it is not as bad as some of the god awful poker simultion packages out there (see Chris MoneyMaker's game; roflmao at that one)but I do wonder when the makers of these games will realise that poker players want to see lots of hands not bad cartoon graphics ( or even good graphics for that matter) of someone doing a lap of victory every hand.
Most of the time I am not looking for a substitution for real players because there are hundreds of thousands online at any given time, so for me there is little need for this, apart from if I am travelling or commuting. A serious player would get more pleasure and benefit from listening to a podcast or reading a good book about poker than they would from playing this game.
Additionally I would say that if your travelling and want to play a good game of strategy for your GBA or DS get yourself Advance Wars this will keep you going for hours, because this game was made for handheld consoles; poker wasn't!
For a beginner this might be a suitable way to get a little practice and knowledge of the intricacies of poker. However even the scope for this is very limited because the play resembles virtually nothing to the live or even the online poker experience. The beginner would learn a lot more in a real live environment.