I have a set from the the first guy, excellent finish, fast delivery & like simon & Billy said he has been around for a long time, makes them himself & rides a Rocket as well 8)
The chrome on one of my Rivco exhaust covers cracked and started corroding. I contacted Rivco direct and they are sending me a replacement straight away. Great service from them so I can't complain
The guy who sells the first set lives near me and is a fellow R3 owner. I met him when I picked up a cat bypass from him.
I have his covers (though I bought them secondhand) and they are fine. Never seen the Rivco ones, so can't compare, but at the end of the day they're only bent bits of shiny metal