Milltek Exhaust

Hi there.
seriously thinking putting Milltek on my B8 S4
Wondering has anyone did the same on their B8 S4? Did you go for the twin pipe or the oval? If I went for race version does it mean it is louder and will i fail my MOT in the future? Are you happy with the outcome? does it sound as good as the AMGs? Sorry for bombarding all the questions? Just thought if I am going to spend circa £1800, i just want to make sure I've made the right choice.

Thank you so much in advance. Looking forward to hearing your views

I didn't think they could match the V8 AMG noise. they are pretty awesome. Just want to see if anyone has done it and share their views that is all. Surprisingly the lack of comments here.