The INCOG body is a quality made product that I really like in theory. It has a couple of downfalls though which make it a no-go in my opinion:
The canted clips are a great idea for tucking the grip, they just don't work that well. You can't force a clip to beat physics, the holster needs to have a tuck feature built in to the body IMO ala JM Custom Kydex for larger guns. Also, due to design, if someone puts their hands on the grip of the gun and pushes straight down, the holster can rather easily rotate 180 degrees leaving the clips semi-attached to the belt and the muzzle pointing back at the carrier.
This summer I took Shivworks/Southnarc's ECQC class for the first time. I know "Well in ECQC..." sometimes feels like a cult-like response to some questions, but it was an eye opener about what and how I carry. Of the 16 students in the class I would say half of them had tried the INCOG and none were currently using it. I also know up to a certain point Craig mentioned an INCOG had never survived an ECQC class. Meaning as soon as any physicality was introduced beyond drawing and shooting the gun, the holsters were failing in some way.
This is why I am a big fan of durable holsters (which the body of the INCOG is) and very sturdy belt attachments like webbing snap loops or fixed loops (which the INCOG does not have).
Good marketing and spokespeople sell a lot of bad gear. I don't think the INCOG is a piece of crap, but I think it could be improved upon greatly.