I have one of their seats on my KLR, wish I had spent the extra $100 to get it done at Laam, the Seat Concept seat is better than stock but not nearly as comfortable as the Laam on the FJR
I put one on my Gen I. It is decent quality and I was happy with the install as an overall improvement over stock. But I have to agree with big John, for a little more money you can get your seat recovered by a premium seat maker and have a lot more long distance comfort.
Search, as suggested by RossKean, or use the Advanced Search feature -- the gear icon to the right of the search box -- for "Seat Concepts" (use the quotation marks). I got 58 hits, although that total does include this thread.