The reasons are fairly simple. For starters, Google code is always public, there’s no possibility to make some sections private of your code. Secondly, the speed! What a difference. Third…the moment you’re passing in assets like photoshop or illustrator files.You’ll be happy to know that xp-dev.com supports bigger hosting space. 1,5GB!
And to end it all even more nicely… it’s for free! Check out the reason why posted by the founder.

Just what the doctor ordered! Just created an account, seems pretty interesting. It also has some basic bug tracking functionality, but I doubt that will be very useful once you’re used to Jira :D