I've always used velcro, but have been thinking of going to zip ties. My problem with velcro is I've had the velcro stick to the board and peel off the bottom of the pedal when I go to move it...and it's happened more than once. It's especially bad on pedals that have a rubber type coating on the bottom. The glue side of the velcro just doesn't seem to stick to it very well. And then there's the issue of pedals that have feet on the bottom. Zip ties seem like they'd solve a lot of those problems, but maybe create more? I dunno, haven't made the move yet.