Absolutely brilliant. My generator acoustic cover does exactly what it`s supposed to. I couldn`t believe the difference in noise reduction not only from the genny but also from my nosey next door neighbour. So much so that I tried it for the first time this week then went back into the house watching telly and forgot I was still using the genny. I remembered when the lights went out .It had run out of petrol. I asked Grant to do a small modification to the cover and he was kind enough to meet me on a weekend when he doesn`t usually open. Thanks again. Very happy. Neil