Watching it again after many years, the 'witty' verbiage rings more self-conscious than impressive, as does a filmmaking style thoroughly soaked in Tarantino and MTV. Its posturing gangster masculinity is also irksome if that kind of thing bothers you (didn't then, but it does now). But it's still a fun watch, and the narrative gymnastics have lost none of their sheen despite Ritchie subsequently rehashing himself.
This movie is so extremely similar to its "spiritual successor" Snatch - including several of the same actors and some very similar songs - that I find it almost impossible to judge on its own merits. I can only judge it based on how it compares to Snatch and in that regard, it is inferior in every way. It's fun enough on its own but I can't find much reason to watch this when Snatch exists. It gets a B-.