I don't know about Mesa's Jungle-jets, but right now I am sitting in First-class on a Mesa CR7, and must admit that this is THE most hard and uncomfortable seat I have EVER been in. I'd rather be in the Jumpseat of a SkyWest aircraft any day of the week - they are far more comfortable!!
I hope Trans States plans on gutting those aircraft...
BTW, still sitting on the plane at the gate - delayed due to MX...imagine that!
Edited to say that from my seat in row 1, I can count no less than 7 - yes folks, that's right - 7 MEL stickers, as well as the INOP placard on the armrest beside me!

I should have waited for mainline...