These are unknown here in Perth, but I knew of them from my previous life, so I had some sent up from the States. They are an alternate to cleats or toe clips: http://www.powergrips.com/ I added them and went for a ride. They help quite a bit - I expect anything that holds my foot to the pedal would give benefit. I noticed I was tired trying to keep my foot on the pedal - I tended to push my feet further out so they would rest more on the pedal. I also notice my shoes have some input too - my feet are loose inside the ones I wore, and so I didn't get the full benefit. I have the thought I will go shopping for comfortable and practical cycling shoes - even without the cleats, the firmer sole would likely help and I might later try cleats. It's really easy to get out of them - the natural movement to put my feet down on a Cruzbike does the job.