My Yaktrax were like ball bearings in some situations and on the Mn. North Shore last winter wer almost useless. These Microspikes do the job under every circumstance making them effective when the walking surface fades form snow to hard ice. They are not nearly as aggressive as crampons and are really easy to put on your feet. My mistake this year was using them on the driveway when snowblowing but now ia can use the old pair for that and use my new ones for photographing...EC