The best description of this movie is "based on the video game of the same name".
From this, you know that you can expect graphic violence, awesome weaponry and zero plot, and this movie delivers all of those.
Short Attention Span Summary (SASS)
1. Give us your unwanted, your unloved, your bald - so we can bar code them and make assassins out of them
2. We're not against putting out contracts on our own, if necessary, to spice things up
3. Doubles are usually trouble
4. Even assassins like having a pretty face around, even if they don't know what to do with the body attached
5. The Russians are coming
6. Dying with dignity now involves swords
7. He really IS quite charming when he's not killing people
Fans of the video game would probably rate this 4 stars or more, people who need a cohesive plot, maybe less. I'll give it 3.5 for the guns, gore and lack of gravitas.