All I can give is my opinion. Which over the years having dealt with a shed load of manurfacturers, products and technicians on various cars is relatively well founded. The sound clips you hear on a computer audi system can only relay the frequency of the size of speaker/magnet of that system. These exhausts sound amazing on the car and suit it down to the ground. As for the service, these guys looked after my car extremely well. They portrayed the fact that they new it was my pride and joy and hence were very careful with the fitting and assembling of the exhaust. As well as this they turned the car around for me in a day knowing it was the only available time I could collect it. Thats my opionion and Im sure James agrees. I havent heard other systems, but thats because Im so happy with mine I dont feel I need to. Hope this helps.