Just for statistic...
I've оrdered directly from SeatConcepts.com site for KTM 690 Enduro (with note "from advrider" - discount is always for good
)
The seat is MUCH better, then stock. Ride about 500-600km per day - it's not problem for now.
On 690 is very strong plastic seat base, so it's a good idea to heat seatbase by something like industrial dryer step-by-step. Otherwise it's hard to pin cover by mechanical stapler or if use more strong stapler - it could make a cracks in plastic.
If you ride hard and use a kneeguard, then a sides of the seat cover must be reinforced. I have a hole in it just for one trip... Standard _SeatConcept's_ seat cover is nice, but very soft - only for "on-road" use.
In total - very recommended for owners of KTM 690, who ride more then 200km per day.
ps
sorry for my bad english :]