A lot of people here "love" the Satos... My bike came with Two Brothers... I bought the bike with only 200 miles on it. The Two Brothers exhaust is nearly 2 years old... people on this forum really "hate" my exhaust... they say they are "junk"... I have to reply that after two years they still look brand new... I took them off and put original back on (bought on ebay for $50) because I like a quiet ride... Sure, the freeflow is not the same, but the quietness is most enjoyable! I would say that the only fault of the Two Brothers is that they are just two loud... if I was 20 years old it would be really cool, but I am old enough to think that they are overly bothersome... but again, I would not say anything bad about the quality of the craftsmanship for the buck. If expectations are kept within reason of price, the Two Brothers works well... but only if you like it LOUD!