I just replaced the front seats in our 2015 Solera with Knoedler air suspension seats. Got them at Seat Specialists on the net. Very expensive, very comfortable and worth every penny! My wife has horrible back issues from multiple failed fusions and we normally can drive no more than two hours without her having to lay down for an hour or so. Monday we drove over 6 hours on some very rough freeway with just a short potty break and she did great.
A huge plus to the amazing comfort is they raise the 6" needed to get the seat height right when you swivel them around - so you get really great "lounge chairs" as part of the living area.
We just took a long drive so waited to do a write-up but I will get a complete description of all the pros/cons/install issues hopefully done and posted this weekend.
If you do decide to get them, you can get a small discount with this link http://seat-specialists.refr.cc/62H*DXH
Disclaimer - I get an incredibly small kickback also. Enthusiasm for seats totally unrelated!