Speedplays are not a good choice for winter riding. Had both feet freeze in place one cold day. Absolutly could not free my feet. Kept riding till I got home and fell over in the yard. Then had to slip out of the shoes still cliped in while laying down, bike between my legs. Wife saw me through the kitchen window. She was still laughing when I wandered inside.
Very first clipless(older Look) ride ever resulted in a tipover at a stop sign. Of course a car load of youngsters witness it. For some reason they found my crash histerical.
These only two incidents aside, I love clipless and would never ride uncliped. I have made life somwhat easier by installing matching mtb pedals on all my bikes. Now I have only one pair of shoes to find and prefer resessed cleats for off the bike.