Ares Armor EFFIN-A Comp

Has anyone ever used this comp? I seen the deal through Gearhog and then checked it out. The device gets some pretty good reviews. This is a tunable comp for 5.56 or .308. The have small set screws that can be installed at different positions or removed on the comp. This seems like a good idea and all the reviews seem to be positive. I use a YHM 5m1 or something like that and every time I shoot my AR the feel the concussion and it's very loud. I looked at some of the videos and they do say it's loud but not much on the concussion. I am not sure if concussion is the proper term, its like a wave of air when the rifle is shot. I understand that most comps/breaks are loud but some have to be louder than others. Any thoughts on other comps that you have used would also be appreciated.

http://www.predatorarmament.com/effin-a-compensator-by-ares-armor/