What shoes do you have? Lake winter boots
How cold is it where you ride? ends up in the single digits during winter
How much more time can you spend riding in that temp. because of your shoes? 2 hours
How do they fit (relative to anything, like Sidis, like Birkenstocks, like other cycle shoes, or other street shoes)? Mostly even with Sidis though I run a half size larger for room inside
Do you also have extra insoles or booties or other tricks up your sleeve (or your sock)? Charcoal heaters on the outside of a liner sock or on the smartwool sock inside
Anything else? Keep your head warm to help keep your feet warm