They’re good- basically Kwak’s take on the SV650. Fairly comfy (for a naked bike), not a bad wee engine either. Finish quality isn’t great and suspension a bit uncontrolled (well- like I say, it’s Kwak’s take on the SV650, so it comes with the territory) but I’ve never heard of any major reliability issues.
Doesn’t strike me as a great price though, they can be had for £5400 new
(I think I’d have an SV650S for £5000 new tbh! But I am biased. Actually no I wouldn’t, I’d buy a 2002 model with as few miles on it as possible, because they’re prettier. But I am very biased). More biddable engine, lighter weight, slightly quicker handling. Bit less comfy.