Last week I had the pleasure of attending Autodesk University for the first time in person. The conferece also happened to occur just prior to Formula 1's Las Vegas Grad Prix. This meant that many of the traditional carriers had higher priced flights than normal.
Source - By John Davies - CYOW Airport Watch - Gallery page http://www.airliners.net/photo/American-Eagle/Embraer-EMB-145LR-%28ERJ-145LR%29/0969536/LPhoto http://cdn-www.airliners.net/aviation-photos/photos/6/3/5/0969536.jpg, GFDL 1.2, https://commons.wikimedia.org/w/index.php?curid=27090913
ERJs are not known for their spaciousness. They are typically loud and beyond cramped. Economy seats are in 2+2 configuration and even those of average height (5'9/175cm) will need to squeeze and stoop as you maneuver through the cabin.
JSX is not an airline in the traditional sense. Per their marketing, they’re a “hop on, hop off service” that offers seats on privately chartered aircraft. The aircraft themselves are more akin to a fully first class commercial layout than a plushly appointed executive jet.
That’s not a complaint however. The aircraft themselves have ample room, free drinks, and free snacks.
JSX offers limited routes that are typically leisure oriented from affluent areas such as LA, Austin, and Orange County.
Once you board, you'll receive a menu. With only 15 or so people on board the 20 minute process to board, order, and takeoff was quicker than any domestic flight I've ever taken. For a 90 minute wheels up to wheels down experience I’d do it again under the same circumstances. But, none of this is the best part!
JSX typically flies out of the cargo or private side of terminals. If you are flying out of LAX for instance, you can avoid the traffic and head to the cargo side. The terminal is decidedly more doctor's office waiting room vs. traditional airport lounge.
Luggage is handed to you right as you deplane. You'll carry your luggage to a similar business like terminal where you can wait for your ride.
The Las Vegas Terminal (pictured) was similarly located away from the masses of people flying on major carriers and had plenty of space to wait for my Uber.
Per Wikipedia: For regulatory purposes, JSX is setup as public charter operator and does not directly operate aircraft. he arrangement allows JSX to utilize pilots who are qualified to operate charter services, who can be either less experienced or older than allowed on commercial passenger flights.
This did not impact my flight experience at all and is similar to how many all inclusive vacations may be sold.