If you enjoyed lock, stock and two smoking barrels, you are bound to enjoy this. You need an element of concentration, as a lot of characters are introduced in a short period of time. Also the plot seems a little bit confusing initially, as it seems to involve the theft of a large diamond, and then progresses to illegal boxing and fight fixing, then all the villains are trying to get their hands on the diamond again. It can be a little hard to follow in places.
But it's one of those films which you can sit back and enjoy without thinking too much about the plot, as it more or less explains itself in the end. But it would probably be more enjoyable watching it for the second time round.