I used lightstream to get some cash to buy a stupid jeep a few years ago when I was between jobs, had a month off before I started the new job, and wanted to it sorted out and maybe wheel it a few times before I had to go back to work....new job had a starting bonus that should have paid off the loan, except they changed that when I started and there was no bonus. I ended up selling the POS and paying it off in a few months, but the process was simple and quick. I have great credit, and the interest rate reflected that but was a bit on the high side which is understandable for an unsecured loan.
If you have your shit together to some extent...I'd say it's a decent option.....otherwise, they probably won't loan money to you so won't be able to fuck things up. It was my understanding that they only considered loans to low risk borrowers, maybe that's changed...dunno