I flew Spirit for the 1st time this past February Boston to Fort Meyers. I was very anxious due to all the mixed reviews and I did a lot of research. I do believe a lot of the bad reviews out there (about the prices and the flight in general) are from people who maybe did not research. Are the seats small? Yes but I've sat in smaller seats on AA. I'm 5'9" and "plus sized", I'm solid and carry most of my weight in my butt (unfortunately!) and the seat was average width wise, it was just snug pitch wise (but not unbearable). I paid some extra money to have an aisle seat and I was able to put the armrest up.
Yes you have to pay for everything, even water but the prices for the snack boxes weren't more expensive than any other airline and obviously you can bring your own food and drink.
I paid to check a bag. The only thing I did NOT like about checking in (well aside from having to pay) is the weight limit. It's only 40 while I think Jetblue and most other airlines is 50. I am a terrible packer so this was a hard one for me but I just made it with 38 lbs. lol You can bring a free "personal item" and it has to fit into their test box at check in. It's bigger than it seems. I bought a duffle bag on
Amazon that was designed to fit (there are tons of them. Also tons of youtube videos with packing tips), I had that thing packed to the gills and it was still smaller than the test box.
So it is what it is. If after all the fees, the price is a lot cheaper than any other airline, I would consider it. (depending on how long your flight is. if it's a longer one, it may not be ideal. Also, i don't think Spirit has the bonus of being able to check in for your departing flight at WDW hotels like other airlines). Unfortunately, for my trip, it's even more expensive than Jetblue which I didn't think was possible!