Like others have said the paperwork is terrible but my wife and I did it last year, I signed the papers then drove to Indianapolis for our wedding rehearsal on a Friday night. Cut it close too probably wouldn't have been a wedding if i had been late. Also terrible is an understatement for the paperwork, it really really sucks. I think it depends on who you work with at the FSA too. I had a freaking fruitloop of a guy and he was terrible to work with, would tell me deadlines of things the day before they were due etc. The 1.5% interest sure is nice though