The Good: Keeps the chain in place, lightweight and a nice look. The taco is thick and probably handles pretty well hard impacts.
The Bad: Like every other guide that has range adjustments could be a pain in the arse to install properly. The roller shell just disintegrated after a month of use without notice, screwing my weekend rides. Bolts come loose often aswell. The roller attracts to much debris and it's very hard to clean properly without disassembly of the whole guide.