I need some feedback on the FitBit before I decide whether I want to purchase one. I'd like the good, the bad, and the ugly. What are the pros and cons? Has it helped you to lose weight?

I've skimmed through some of the reviews on Amazon, and there seem to be some durability issues. I figured I'd post here so that the experts could comment .

Also, what's the difference between the FitBit and the BodyBugg (or Go Media), besides price?

Thanks!