I check out the site from time to time. It isn't worth my time to be a lender. The amount of work involved to diversify and hope to get a decent return isn't worth it.
The site has an ongoing problem with scams and borrower info that has not been properly verified. Maybe down the road it can be a better investment method. For now, I would avoid it as a lender.
As a borrower, it appears to be a good deal. There are lots of lenders giving money to some questionable offers.
For example if the loan fills she will have a $903.81 monthly payment for 3 years. A $900 per month payment on top of other expenses would be difficult to maintain for most people.