Fitted a Moss Cobalt stainless steel exhaust to my mk2.5 this week.
Being a little older than most, I still consider exhausts as a consumable that will need to be replaced, so couldn't resist the Moss sale a couple of months ago.
Looks well made. The only downside I could say visually being that it appears to have an extra cowling around the exit pipe, which appears to only be there to make it look bigger. Just a bit naff IMO.
Fitting was done by a local indy, who's comments were frankly unprintable, though clearly they got it on in the end.
On the road. At tickover, very similar volume to standard, just a little more baritone. Definitely sounds better than the standard exhaust, which IMO made the car sound more like a spin drier. Under light load, pretty much the same. Give it some beans, sounds great. The only downside I've found being at 30-40mph in uphill sections, when it drones a little. In short, definitely sounds better for 95% of the time, so I can live with a bit of drone.
All in all, I'm happy with it.