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The one touch-hold feature gets two gold stars from me for innovation and function so far.

I wanted to try the touch-hold feature on this pneumatic unit. Adjustment for the 'slam' at the latch point is trial and error with the mounting bracket holes and the two 'adjustment' holes on the unit. When the closer hits the latch point it will slam shut. The close speed from that point is adjustable with the vent screw in the end to close at a smooth rate until it approaches the latch point. Since air is compressible it slams half way closed, slaps your backside, or chews your ankle, or then bounces a couple times if there is nothing to hit. This pneumatic closer works basically like any other pneumatic closer. No comment yet regarding durability because I've had it a week.

No matter what I do, I cannot get it to perform when may main door is both open and closed due to the air pressure of the seals. Changing the adjustment to half an inch makes the door "bounce" and close when the door was opened fully, and there was still some stopping power when the door was opened slightly so it does not slam.

Moving the door mount point an inch away from the hinge (tensioning the spring) allowed me to get the door to close fully and rapidly with no slam when the door was opened fully, but when opened slightly the door would slam. When I mounted the piston with no tension whatsoever on it with the door closed, it was tricky to get the door to close well. They give you a number of ways of performing the adjustment (the front and back holes on the piston at the door mounting point where you mount the bracket on the door itself the multiple holes in the bracket on the door itself) but basically there is an air piston that slows the travel when the door is closing AND a spring within the piston that is pulling the door closed. What isn't obvious until your think about it (and/or look at the website) is that a critical adjustment is the distance between the mounting point on the door jam and the door itself, i.e., the amount that the piston is extended when the door is fully closed.