Make sure that you ride it off-road with 70/30 tires. Watch the videos - the dirt performance is awesome, as long as you're not trying difficult single-track.
The tire/suspensoin combination make the urban curbs, bumps and potholes disappear, just like on a DS, but with much better street manners. A true SM is but built on a racing MX/Enduro chassis - a DS with SM wheels and tires, adjusted suspension and rake/trail is simply a DS with a different set of compromises. Some like it, some don't but they rail almost anywhere they go!
Edit: I think that the reason that they didn't really catch on in the USA is that there hasn't been a consistent racing series here to promote the concept, or am I wrong? They started the racing series in Europe, right? and the trend went pretty quickly to the streets?
1990 Honda NT-650 Hawk-GT
Never doubt that a small group of thoughtful, committed citizens can change the world;
indeed, it's the only thing that ever has. - Margaret Mead