I think people here are more than happy to give their opinions even without tricking them into looking.
Anyway, my understanding is each school has several preferred lenders that they have special deals with. So you should really just check out the terms and see which one is the best. As in, the one that offers the best incentives. Things like most amount of interest rate reduction for on time payments, etc.
Otherwise, I feel like they are all reliable and haven't really heard of any specific one having amazing service compared to others.
My understanding is that it really depends on the school and the state. Where I went to UG and where I'll be going to med school, the lender/bank only owns the loan for however long you're in school for. The loan is then sold to a state-funded institution, and you pay them back over the life of your loan. Maybe it's different for other states, but that's the case where I live.