Running a Deville/Vip’r combo for several years now, have been faultless. Plush, never bottom out despite me being a big lump and landing drops to flat, only now thinking of servicing the forks as it’s been a few years, but no performance decline that I can detect at all. I did have a slight airlock in the forks at first, slipping a cable tie between seal and stanchion on the air spring side fixed that, they’ve worked perfectly since.
Have a Stoy on my DH bike, makes a squeaky chirpy noise, which was weird at first, but I don’t hear it now, and again, no issues.
Mate also runs Devilles, no issues at all.