Fitting time was around a was a couple of hours - I totally removed the springs to fit them rather than try to poke them in situ. I also used
TIGERSEAL to attach the plastic discs to the upper and lower spring pans to cushion the airbags.
I used a tee piece and joined both airbags to a common schraeder valve at the extreme rear of the side doorstep - I don't have a side conversion so apart from the driver the vans fairly evenly weight distributed. I should've taken pics but I wanted to get on with the job before the rain came on
Initially I put too much air in - around 30 PSI and the van bounced about a lot. I'm now happy around 14/15 PSI = the van's the same height, the bags are just touching each spring seat when unladen so the main spring is doing the work until you load up or hit a big bump or undulation.
I initially thought the dampers would get a harder time - especially on rebound but as the spring movement is less (because the airbags take some of the load and rubber has a natural damping effect) the damper gets less of a hard time even on long hauls.
There's also less body roll on cornering and definitely MUCH less bottoming of the bumpstops.
I don't know about the bags puncturing with lowered springs Ste - unless they become coilbound - I'd have thought the bumpstops would have ensured that didn't happen. Maybe Marcle were being cautious

I know Mountain Goat's punctured but that was due to incorrect fitment IMO