We just had air leveling added to our Dutch Star. We had HWH's system, so now we have both air and hydraulic leveling. For us it will be long term/short term deal. Plus the ability to level in rest areas.
We did not opt for Active Air, that is a whole different beast. This system completely changes the way the coach handles and drives. Which double the installation cost and will take about a week to install.
We did live in our coach while they added air leveling.
Redbaron73 (on this board) added Active Air to his coach and has a blog page.
The old leveling panel
The new leveling panel. To auto level you just press which one you choose, twice.
2013 DSDP 4347, all electric, 450 H.P. ISL
Air & hydraulic leveling
14 Jeep Grand Cherokee Overland toad