Installation is definitely a faff. I ordered the OLED display which will fit only 22mm tubes max. Like most bikes my handlebars are much thicker and the gear/brake shifter assembly leaves no room at the narrow end. This is a design failing so check yours before ordering one. I will have to fabricate some kind of workaround. The installation pictures all involve old school bikes with quill stems, thin handlebars and simple steel frames which I'm sure is quite unlike the type most buyers will have. As I have a carbon front fork I also ordered the universal torque arm which apart from meaningless instructions is too thick to allow enough axle thread for the end nut and so will be returned. So definitely more than 2 hours fitting time for me.