I'm running with Power Grips and a lightweight (-25 F rated) winter hiking / snowshoeing boot. I have big feet (14) and toe clips don't allow my foot to go in far enough. But even for smaller feet, Power Grips are adjustable to put whatever part of your foot you want on the platform, as opposed to a pre-set placement. For example, with toeclips, a person with a size 11 will be pedaling with a foot more forward than a person with a size 8, which may not be optimal for either person.