Our previous 2008 Monaco Dynasty had both hydraulic leveling jacks and air-bag leveling. I used both depending on the surface. Concrete or a very hard surface I used the jacks... softer surfaces like gravel, grass or asphalt, I used the air-bags.
Honestly, I like air-bag leveling the best as that is all we have on the new coach. I never have to worry about hydraulic fluid (ours had failed once, reservoir box needed replacement).
With air-bag leveling, I know that all of the tires are firmly planted.
MM.