Well, what I like about it the most is the restaurant feature. When me and a couple buddies go out, we usually split the bill. It gets annoying adding how much you spent, then adding what everyone thinks they spent, and coming up very short.
The concept of where you can drag what food/drink items you ordered onto your credit card or to your bill is great.
This makes the waiter's jobs a whole lot easier, which means = less tips. They'll just be bringing out the food... that is until someone invents robots to automatically serve you food. Then they should be really concerned.