Thinking of buying a S/S box from MX5 HEAVEN as anybody fitted one?

I had a go-perform system on mine and it was lovely. Most of the mx5 Supercup competitors use the system but the race version not the road.

Ive fitted a colbolt s/s on my 2006 2L, and love it.
It’s got a really nice growl when you give it some gas, and a little bit of burble on the overrun, but at no time is it obnoxious…
Pootling around at 30 you wouldn’t know…
It did take about 1000miles to bed in though. From new it sounded very OEM but now, it’s spot on…??