I have a MFactory LSD in the MK6 GTI (K04'd) and i have to say probably the best thing have done to that car so far and definitely prefer it to previous experience with the other brands i have used in the past on the mk4 and mk5s. I'd consider another, but have an S3 which obviously no use for haha. For those who are considering it, definitely worth it. Pity they don't offer one for the 02A as i would be keen straight away for the mk2.
All received quickly and in excellent order, should try and add my thoughts once tested but my O2J equipped will not be ready to roll for another few months.