|Unlock Forum posting with Annual Membership.|
I use it. I've gotten quite a few loans from it.
Thing is, you'll need to make sure to set your choice of books to the Max of 3 books a week. I'm sure they do that to keep people from swamping it. It's easy to find if a book is lendable or not. And if you want to make sure the book you want to borrow is actually in the system, you can check "Browse by Genre" and chose "Read it Today". Otherwise you chose a book you want and then just have to wait to see if it is in the system.
I also like "Books for my eReader". It's harder to enter and search for books, but you can see who has them and what's available. (That is, as long as the member is keeping up with their library.) They also encourage ordering as many as you want, and have a rating system for members. Like here, some people join up, list books, then never respond to orders. So far I've had pretty good response.
Both sites are free, so I think worth checking out. Each has strengths and weakness.
But be aware that just because a book is currently listed at Amazon as 'lendable' doesn't mean it will be in the future. You could order a book that was lendable, but by the time you and the lender get to exchanging it, it's not anymore. Nothing the lenders can do about that.