I have the blueflame on my stage2+ edition 30.
Weld quality like the entire system is superb.
My brief before purchase was a quiet-ish system that didn't offend my wife or produce any resonance on the motorway.
I shy'd away from Milltek as my previous resonated system droned like hell on the motorway.When I spoke to Milltek they told me this should be expected after 2 years and 12,000 miles which I thought was poor.
The blueflame does have a different note to the Milltek but does not drone at motorway speeds and I have the ITG induction kit fitted also.
If you're in the Bristol area, your welcome to hear mine.