i do. they get the job done. make sure your tennis shoes aren't narrower than the front harness or your toes will be in lots o pain. the other brands seem to have even bigger and softer front harnesses for sufferin and front point loss, so these are good enough i guess. i've climb some vertical sections in my tennis shoes with these andd managed (with very numb toes) and haven't bent the shit out of them yet after extensive use. better than duct taping regular crampons onto my tennis shoes like i was doing before that's for sure!