zx6 crash protection (frame sliders etc)??

Has anyone got any advice for crash protection for the ZX6.
i have a 2005 model.
ive been looking at frame sliders and the prices vary drastically so im not sure what is crap and whats not.
I thought i would see if anyone else has fitted these things to their zx6 and if you have any advice or opinions on different products.
Do people feel that these things are worth it? do they protect your bike all that much anyway?
thanks
i have a 2005 model.
ive been looking at frame sliders and the prices vary drastically so im not sure what is crap and whats not.
I thought i would see if anyone else has fitted these things to their zx6 and if you have any advice or opinions on different products.
Do people feel that these things are worth it? do they protect your bike all that much anyway?
thanks