I lurk in here to pick up info on riding around in Toronto - I haven't been in the city too long.

FWIW, I've used both Looks and Zeros on my road bike (usually longer rides, very little in/out except for stop lights, very little walking) and greatly prefer the Zeros. The non-centering float does take a while to get used to, especially in sprints or climbing out of the saddle. Two-sided, easy to clip in, easy to clip out. Maintenance is a breeze.

My $.02