Great bike. The eager parallel twin kicks out 60 bhp and has a lovely powerband from 7k right through to the red line. Returns an easy 55 mpg if you take it steady. The motor sounds lovely as well, with a nice deep growl under acceleration.
Handling is OK within its limitations. Suspension can get bouncy if you press on too much, but ridden up to eight tenths, its light weight and good balance make it a very easy bike to chuck about. There is nothing intimidating about this bike, but it's not so dull you can't enjoy yourself on it.
I liked the "baby GPZ-900R" looks, which to my mind are still fresh and a little bit different. The CB500 might be a better built machine, but the Kwak is more interesting to look at.
Mine was utterly reliable. It lived outside under a tarp in all weathers, and would fire up first go come snow, hard frost or damp. Always got me to work and always willing to play if I took the long route home. Easy to work on too - the valve clearances adjust with a locknut and screw, and the plastics come off quickly and easily, meaning even the 8k "major" services are feasible for the average DIY mechanic.
At 2/3 the price of an equivalent aged CB500, the little Kwak is stonking value and for novice riders or commuting, it will do pretty much anything the more expensive CB will do.
A great little workhorse cum weekend toy, and highly recommended.