I gave Spirit a try earlier this year for an
ATL-
FLL day trip. I managed to snag an $85 round trip ticket during a sale; for that price I'd say it was worth it.
My expectations were set very low, so I was pleasantly surprised. The seats were very close together, but otherwise reasonable for the 1 hour flight. The staff I interacted with were all quite professional, although the other passengers were on average very low class.
Even though they are priced pretty cheaply, don't splurge for the "big front seats". I paid $30 extra for one, but found it very uncomfortable.
Make sure you wait for a fare sale before booking. Spirit's prices can fluctuate +/- %50 day to day. There are certainly some good deals to be had, so enjoy your trip!
I reject your reality and substitute my own...