I tried them out back in February for a Sunday flight home from Vegas and will likely never fly anything other than JSX to Vegas... at least coming home on a Sunday.
I go to Houston about every other week, usually for a day trip or 1 night. I have taken JSX the last several trips, combined with the onsite Go car rental, and it makes a day trip more doable and damn near relaxing.
I have showed up at the FBO 5 minutes before departure and made the flight (no bags), and we were literally wheels up 10 minutes after I had handed my keys to the Valet.
Tickets run cheaper than business select on SWA and also a bit less than first class on American or United. Highly recomment.
I noticed yesterday that they are offering DAL to CLL for Aggie football games as well as a couple of away games. $599 round trip but you get your pregame and postgame beverages gratis and no TSA.
https://www.jsx.com/gameday/select