I did refinance with SoFi. They gave me 3.2% variable 10 year (with direct deposit deduction it was 2.92%, but recently dropped to 2.91%!!!!) I am paying off aggressively, and refinanced just over $70,000 from the federal 6.8% rate. I figured I could knock a chunk out before the rates went up, and I would have close to 4% to work with before I was even paying the same rate again. Plus they are capped at 8.6% or something like that, so I wasn't gambling with too much...especially if rates stay low (thanks Fed for keeping artificially low rates for the time being - this is the only time that I will ever thank the Fed, for anything...)
If i recall correctly, the loans are forgiven upon death (though probably after settling with the estate to the extent any assets are left).
The interest is tax deductible if you qualify, unfortunately I do not.
When i first signed up they offered me some higher rates, but after a few phone calls and some negotiating with supervisors, I was able to get them to lower their rates significantly (this was about 6 months ago now). It never hurts to ask.
If anyone wants more info I would be more than happy to give more details, let me know. So far I have been pleased with my SoFi experience. They also have a referral program where you get money if someone joins (and the new customer gets money too, like $100 for each...free money). This is my referral link, if anyone is interested
http://friends.sofi.com/HGpn