What's the hold up? I mean is it the shoe tread, shoe snagging on the strap, strap not adjusted big enough to accomodate the shoe, entry/exit procedure?

I had these straps on my hybrid and if I tried to stick my foot into the strap straight forward, things would catch and I'd have to wiggle to make it work. Entering into the strap pigeon toed (per the instructions) and then twisting your foot straight helped a lot. That's the procedure called out in the instructions ... pigeon toe to enter, straighten foot to snug the strap .... pigeon toe loosen strap and pull foot out.

The strap is somewhat size adjustable. Just loosen the screw and slide some strap out and tighten the screw back. By desing, they snug up as you straighten your foot out. They shouldn't be snug on entry/exit.