OK - Here is my 4 cents worth.
Got one in Jan 2019. It broke July 2019. They replaced it, no questions ask. Sounds bad but as they say, BUT WAIT THEIRS MORE.
Of course I knew nothing about it to start with. It ran good and filled my 200 BAR gun just fine. After several fills I noticed oil leaking out the bottom. Seems there is a small brass thing on the side with a hole in it and that is where the maintenance oil is supposed to go. Mine had no brass thing, just a hole in the case and that is where I put the oil (Crosman silicone oil). Finally found the brass thing in the bottom of the case. It goes thru the hole and there is a small clear plastic hose that attached to it and routes the oil down to the piston, not all over the inside of the compressor like I was doing. This probably didn't help the longevity of the compressor. In its last days it was leaking quite a bit of oil from the connecting rod into the crank case. (A completely different issue then my beginning filling procedure.)
I understand the early early ones had problems with the power supply and they fixed that issue. The generation I had also had problems with not enough grease around where the crankshaft connects to the connecting rod and they fixed that. Mine knocked (HAMMERED) quite a bit at the end and finally the connecting rod started slipping on the crank. My first one had a cover over the crankcase. My current one does not and it allows easily access to reposition, or add, the grease.
Thru all this I got nothing but great support from PA and AV. They were top notch.
Around Christmas last year I purchased the Hill Compressor from them to use as my primary unit. The Nomad II is now used for "field trips" and the like, which it is perfect for. Also a good backup. They furnished me with tips on how to properly store it.
I think when they first released it they did exactly like about everyone else in the airgun world and used us as guinea pigs to find THEIR problems.
This compressor had worked flawlessly since July 2019.
Just follow their maintenance directions. I find it quite difficult to get the correct amount of oil in the hole on the side. Sometimes it blows out air and sometimes it sucks. I have never been able to figure how to get it to drop sideways! It is hard to measure the correct amount 2-3 drops. Even the drops can be different sizes. Use the bottle that comes with the unit and they are one size, use the Crosman silicone tube and they are another and using the RWS silicone oil with the thin metal needle and they are still another. In any event DO NOT OVER OIL!
I also heard a lot of bad stuff about the Nomad II. I experienced it.
Think I like it better for "field trips" then I would a bottle.