i had it5 for 20-30 hours on my bike.
ideaal for very muddy rides, the chain keeps clean.
but i foundt it not handy for lubracating the chain(i alwa\ys do the inside of the chain).
With these chain guide there will be no stones coming in the chain etc.
Why did i removed it? i didnt had much muddy rides for this seasons, a lot of dry tides so there for i removed it.
there is not much dirt in the chainguide, no worry,s.
a nother aspect is that with this chain guide when you fall under the bike youre chain will not saw into youre leg if the bike is still running.