KW are "ok", but the only way dual track and road use is ever achievable is with proper electronically controlled adjustable suspension, and even then there is compromise.
I think they are made in Germany...which is better than a lot of the UK and Chinese tat, that is for sure. At least a) they come with proper helpers, b) adjustable bump and rebound, but good luck fine tuning that for the roads, it is a pain in the **** settling on what feels right given all the varying quality of roads in the UK.
Take it from someone who ran a full race setup on the road with -2.5Deg Front camber, with an LSD and went through a set of tyres in 1700 miles. (hard driving though)
Also take it from me, if you want ANY electroplated shock finish (like most of them are) to last more than about 45 seconds in the wild, you need to coat the hell out of them during adverse UK seasons.
Fine if you are a dry day only person and you have a garage, crack on! Anything else, that finish wont last. Dont forget, shocks get stonechips, as soon as you get the first chip... corrosion.