Really fun
PROS:
Really fun
Good range of difficulties
Well animated
Customizable characters
Many different weapons
Some stages have neat things that happen (traps, zero gravity, falling rocks, etc.)
CONS:
Some weapons are too devastating
Glitches (there are almost none, but they are there)
Also, this game would be a lot more amazing if it had multiplayer.
This is possibly the best Internet fighting game I have ever played.