I've used one like it for ages already on this old MTB (depending on gear ratio) at my parents and from the ones I tried it's the best. It's very sturdy and simple so there isn't much that can break. Since there is no spring you can use it either way (push up or down). The wheel instead of a cog is a bit more forgiving on chain lines that are slightly off or bend hangers. I think you can get it branded as Gusset, more expensive but all black, or this XLC version which is cheap as chips.
Bottom line I am a fan. Good price-value ratio.
I've used one like it for ages already on this old MTB (depending on gear ratio) at my parents and from the ones I tried it's the best. It's very sturdy and simple so there isn't much that can break. Since there is no spring you can use it either way (push up or down). The wheel instead of a cog is a bit more forgiving on chain lines that are slightly off or bend hangers. I think you can get it branded as Gusset, more expensive but all black, or this XLC version which is cheap as chips.
Bottom line I am a fan. Good price-value ratio.