For an alternative, look at Power Grips. I found that my feet got really cold in winter with clipless, seems like the clips bleed the heat out through the soles.
Power Grips allowed me to use winter boots on the coldest days

The other problem I have with clipless is that I have really wide feet, and could never find a comfortable cycling shoe, eventually moved to sandals.

I ride a recumbent, so footslip is potentially dangerous. Pulling on the upstroke also seems to be something I use quite a lot.