...and @sk66, and @Kyre, and @YogaSlackerSam, and @Krazykraut, and probably more. If you sometimes do longer trips with the van full of camping gear they're great. If you never haul heavy stuff (or don't haul it far enough to care about a bit of temporary suspension sag) the extra complexity might be a liability (potential for air leaks, mainly. They still work as shocks even without air, but the airbag parts can be damaged if they don't have at least 20psi in).@Growlerbearnz uses Monroe MA708 air adjustables on the rear of his Delica...
Oh and don't overtighten the lower bushes.