In the past week I've had my cata strada cadence (wired) computer come loose in it's mount 3 times. Hasn't fallen off (yet), but I'll look down and notice that my mph is 0.0 and it's not recording distance travelled and slide it back into place. Don't know if I've taken it off too many times and have now worn down the mount or what, but it's a pain when my whole ride doesn't get measured.