Like many things in life there is a bitter/sweet combination.
This may be contentious, but in my experience at least, these bikes can suffer with reliability issues. I've had the bike in garages with valve spring breaks & blown engines for a significant amount of time during my ownership tenure.
The important aspect to be aware of if considering purchasing is the degree of maintenance, care & attention required.
Forget Japanese bikes that you simply fill up with petrol & go, these bikes need regular care & attention to keep them in good order.
On the flip side though, the performance is unreal & will tear up comparable Jap bikes, & the FS650 can wipe the floor with sports bikes in the more twisty roads.
So I'd liken it to having a really gorgeous & sexy, yet slightly insecure, demanding, & jewellery loving wife....