These are a cool looking stem which bolt on directly to the for crown which means they are super rigid and perform thei job well. They are unbelievably light and yet super strong and because of their low profile it means that the front end will be as low as possible which is great for cornering.
Only thing is they can be a little tricky when putting new bars on them and sometimes adjusting the roll is annoying bacuse there are four bolts but on two seperate clamps. This just means a little more care is needed when setting up ones handlebars
Looks really cool, very simple design which works well and is is super light