I have a kortz and it rides mint. Everyone that has a go on my bike say "thats the nicest stock iv riden" which is quite reassuring
It really depends on what kind of rider you are as to say if you should get one or not. If your a basher then no dont get one as the tubing is quite thin and can dent easily.
If your smooth, which i kind of am then yea go for it I find it really nice for gaps and taps but wheel switches im still getting used to because of the extra length of the frame also it sidehops nicely with more leverage from the long frame. I have a video of damon watson pissing a 55" sidehop on my bike!