Bookish Blerd

...has anyone tried scribd.com or libro.fm?  If so, what are your thoughts? I'm probably going to keep audible for the audible exclusives (I'm on a special membership that only gets credits every other month so they're not getting as much of my money as they could), but I've been saying for ages that I'm always looking for ways to cut the amount of money I give amazon (I buy books everywhere else unless it can't be helped.)  If anyone has any feedback, I'd be grateful because I'm interested, but undecided.