I am going to bump this as I have added two more. BTCJam - worthless. Borrowers - worthless. At least Mosper has the guts to communicate with us.
Unfortunately this is where I was a short while ago, Whilst there are good borrowers/lenders out there, You can bet its a drop in the ocean compared to amount of scammers.
When I lost my load it was just a few $ a bitcoin, Now its alot more, I should have not thought about the small gain, but rather the risk of loss.