I like that their flights are cheap. I'm fine with giving up a few comforts to get where I need to go for a lower price. If you're expecting in-flight entertainment and free snacks/drinks, go to a different airline and pay the higher price.
The thing that really irks me about this company is their customer service. Just hope that you never have to try to reach a customer service representative for anything. This could be difficult because their website forces you to call for almost everything.
I called twice. The first time, I waited on hold for 30 minutes before hanging up. I called again a few weeks later and was on hold for well over an hour before I got to speak to someone. He told me that I needed to submit a complaint online and that there was nothing he could do for me. I'm not sure why they have customer service representatives if this is the case.
I submitted the complaint online and received an email stating that I would hear back from someone within 60 days. I thought that was a ridiculous amount of time, but decided to wait. After 60 days and no response, I finally researched the number for the corporate office and left a message asking someone to call me back. I finally got a response to my email later that day.
The flights aren't bad for what you pay, but the customer service is abysmal.