anyone ever owned a mercury jacket? i found a good deal on one...i can probably get it for under 50 bucks from newenough.com

just wondering if anyone has any input on it. i've been told to go one size up with joe rocket, but i've tried on a few of their jackets and the medium feels good (42). My chest is about 42, i'm 5'10" about 170 lbs, but i'll lose some weight once i start landscaping.