My trainer also suggested this: http://www.performancebike.com/bikes...00_20000_64507

He thought that I might like the option of riding in my tennis shoes from time to time - but I am unsure that I would actually do that given the odd things that happen when I am riding unattached to the pedal. Out of curiosity, does anyone here have these pedals, and if so, how often do you find yourself riding without clipping in?