The buttons are far too hard to push in. I used 6 command strips (overkill to be safe) on each to adhere them and they are holding strong. ) They smell funny, and no its not my feet. Try it, youll love them! Definitely size up at least one size! Ok Bezos. I did charge the light after playing with it to ensure the battery was fully charged. Depending on frame shape and angle of the tubes on it, i could see the bracing arm and brake caliper lining up, which could also make mounting difficult. Ive had this about a year now and somehow got two. These are my favorite, when my father was alive he would get them for me for Christmas or my bday (dec) and his mother.