I was intriuged by the HEAD integrated visor/google-replacement helmets, and used the HEAD Radar helmet all last season (23-24). I love the sphere fit, which is very comfortable since it conforms to your head shape. My head is 59cm and thus at the top of the range of the M/L size, and the Radar helmet was very comfortable. With the Radar, the way the visor/goggle-replacement works is that there is an clip mounted via an elastic cord to the helmet, that mechanically clicks into the visor/google-replacement. It can be raised and is held by a click stop on the helmet but because of the elastic at each side, needs two hands to bring up and down as it needs to be extended away from the helmet before being moved. The lens is big and provides good peripheral vision, but again because of the elastic, is pretty tight to your face, i.e. as tight as a google would be. This seals the visor pretty well, so that no wind gets behind the lens at speed. The visor padding is comfortable, but it is not...
Stuff that I've seen, done or used