Your picture is making me really want one, I didn't expect the tips to make such a nice noticeable difference, over the cut mild steel stock ones.
I had the mountune exhaust on my Mk3.5, but that was mainly because the stock exhaust was so quiet on that car. I don't have the same urge in terms of sound this time, but it looks so nice. Also currently insurance is less hassle with no "peformance" mods.... hmmm.
The mild steel ones are rubbish. MK4 ST sounds nice on overrun with the pops but sounds like a hoover when flooring it, the Mountune exhaust is just right and doesn't look out of place.