Due to the turn-based nature of Pool, games take as long as they need to - rather like a game of correspondence chess - and so lag really isn't an issue. You can also have several games on the go simultaneously, playing them out over a leisurely few weeks if you so wish.
But wPocket Gamer will save further comment on the online portion for another time. For now, they can safely recommend Anytime Pool to any pool fan with an active and healthy Facebook account. Anyone after offline pool kicks should probably head back to their local dive.