WIth this airline, you basically get what you pay for. I think they bought the planes from a "Click", a Mexican discount carrier. Don't take me wrong, the planes are not in bad shape at all. They have leather seats and they are confortable enough.
If you can afford the assigned seating, please do so. It's much better than running and competing against other flyers once they do the open seasting. There are no free chips, no DirecTV, no blue chips, but for a 45 minute flight from Long Beach, CA to Las Vegas, it was worth it. It beats driving 5 hours on the 15 Freeway.
I woud definately fly them again to Vegas if their prices continue to be cheaper than other carriers.