I've heard compare to ryan air in europe
I have only flown them once (well twice, round trip to Vegas for a show and back). It cost $400 to go from Houston to Las Vegas round trip, which was only 30% cheaper than the next option... which i should have paid for.
I got on the plane about 10 minutes after take off was supposed to happen, the pilot and co-pilot were huddled talking very fast and low, which piqued my suspission. After 30 minutes of not moving back, the pilot let us know that we had to get off and go to another gate to another aircraft, and that this one had a light that was concerning them.
So then, after everyone had finally boarded the new plane, we took off about 2 hours late. As we got to Vegas, and the flaps were down and we were coming in on final, the flaps went back up, the pilot sped up and we circled the airport for around 45 minutes, and apparently the landing gear was stuck.
I guess they eventually got it unstuck, because we landed. But 2 planes in a row that were screwed up was too much for me. Even after an uneventful flight back home that same night, I swore them off forever.