Never used mij but my mate curses them all the time. Says they're bunch of crooks.
Torqueflow boys I have used quite a few times and they quite good.
Actually the exhaust I got on bee6 right now was modded by them to fit. Theyve modded exhausts 3 times now for the bee6. .. haven't had a full system made by them so can't say much about that
Imran the chap that owns and runs the business is a great guy and has some real good skills with a welder