Most at my school use Sallie Mae or get it through their banks, however, I think a large part of that is because of name recognition. Everyone knows Sallie Mae from undergrad or the news.
BUT! When I came to med school, I spent long and sleepless hours over who lender to go with (I'm actually being serious, I took notes and made comparisons and mulled over it n everything) and I really liked the bonus and package that THE had. Plus, their residency relocation loan is awesome. From what my friends with other lenders have told me si that for the sake of residency funds (interviewing, relocation, etc), that they would take a small portion/percentage of your yearly loan. Then they give those combined monies from years 1-3, and the first semester of 4th year as your sort of residency/relocation loan. At least that was the way it was with my one friend. THE lets you take out up to 15,000 for residency/relocation expenses. And you get an automatic 42 month grace period during residency. Although they're not completely being generous in this in that they get handsomely paid back with teh acrruing interest.
Anyhoo -- I recently called them a TON of times these past couple of weeks in order to get my loan consolidation questions answered (I'm consolidating my undergradutate Sallie Mae loans in wiht my med school loans with THE). Plus they answered a few other questions regarding my overall loans and terms. They were completely nice. Had no trouble explaining things to me numerous times. I never had to wait more than a minute or two to talk to anyone (most of the time, I got directly in touch with someone).
And they try to simplify things for you so that you can make the most out of yoru loans, grace periods, and individual/personal situations.
I was so happy last week, I wanted to toot their horn. Glad you posted something about THE. In fact, I made the final decision to consolidate my Sallie Mae (undergrad) loans with them also because my experience with THE was so great (previously I had been hesitant to consolidate my undergrad because they were at a low 3.45%).
The only pitfall with THE (for me) is their webpage.
The account page is rather sparce and bland vs. Sallie Mae which spends a lot more money on a prettier webpage and more advertising.