I've had them before on a '15 IA FRD, and really, there is nothing wrong with them I guess once setup in a position you are happy with, and there is a chance I may just stick with them. Minor complaints - hate the spacers system with all the tiny washers you need to use between every layer otherwise face bar failure, so pain in ass to adjust height. No tilt. Worst arm pads/cups on the market, honestly not sure how they came up with those.
Ideally I'd like the tririg alpha one, but the tabs at the top of the felt front cover get in the way. There may be a couple workarounds, one which is to file off those tabs and secure the cover with tape (or maybe a magnet?), but I'd rather not to that.