For me the biggest pain was having to turn them over (in order to slide my foot in) each time I got started at a stoplight.
I had them pretty loose. I'll try it them again, but I was having a big problem with this as well.

The first time I fell, I was just not paying attention. I was test riding the bike, checking out the shifting, the breaks, etc and forgot about being strapped in and was not fast enough.

The second time I was trying to get my left foot in the strap!@!