Has anyone got one? They look nice, are light, and not too expensive… Too good to be true?

Got one on a 5-Spot – it’s replaced a C K as I needed a lower stack height. As you say, looks nice, is light, uses a proper split ring unlike C K so shouldn’t score your steerer. Too early to tell re: how long it lasts!

which one have you got?

i’ve got a cobalt c. its super tiny, can barely see its there!
runs ok, forgotten about it so i suppose thats what you want. for once, something CB that appears to work properly.