I think parse is great... but seriously all your data with them???... and even if they give you back your data, can we make sense of it to write our own library? I just feel that it probably takes equal time (or may be little more) to write your own backend. Plenty of sample code out there, I wrote it in php and mysql even without any prior experience in php. And dont you have to learn parse platform to get it going in first place? then why not just write our own backend?