They suck if you have tainted credit, watch out about applying online they add inquires each time you apply with them. They are kinda like the middle man, you get a list of pre-approved offers. You may get like 2 or 3, then you apply with the each of the offers again and they too add inquiries to your credit report but you may get denied through the lender even though it shows pre approved through lending tree. I think to probably get a loan you will have to have excellent credit with no lates, chargeoffs and etc.
Avoid lending tree. They misuse your application by pulling it for each potential lender or match. They will put alot of hits on your credit report(inquiries). As, if your credit is not perfect, they dont find any matches for you at all. If you have good credit, you dont need them. They are the worse. roni