I worked at Mesa Pilot Development last year. Many of my friends and former students now fly for Mesa as FOs and one captain. Most of them seem to like their coworkers, but the pay is very low for FOs. Also the scheduling and duty times seem to be a common problem with the company. They are not very well respected in the industry because the management tries to undercut the pay of other airlines and forces the entire industry to lower pay scales. Captains, however, are paid about the same at Mesa as the rest of the industry. Top captain pay at Mesa is actually higher than many regional airlines...so you make the call.