I have a torn MCL that has nagged me now for a year. All my bikes are shimano SPD (Road and Mountian). I think float is very important to my riding comfort especially since the injury. Some days I just need my foot knee connection to be in a slightly different position even from mile to mile. At this point I would never ride pedals without float in them, unless I was young and competitive and I'm not. There certainly may be better ones than Shimano in this area, but it's all I know and the float is quite adequate.