I've never bought from this site but I have owned a borla exhaust on my old Zx2. I ran it for 5 years on that car before trading it in. It was a very high quality stainless exhaust with well manicured welds and a deep throaty sound not raspy with no vibrations or back firing like those cheap mufflershop exhausts. Really you get what you pay for and $640 for a v6 exhaust is a good price. Borla doesn't come cheap. The only one that I would consider to be in the same class would be a Magnaflow which is around the same price. I work as a web professional for a living and did take some time to look up the business registry information for the site. I found out that they are a very legitimate company and I wouldn't worry about doing business with them. Not a fly by night company.