Will I really notice that big a difference in efficiency of power transfer if I move from soft soled bike shoes to something with rigid soles (e.g. the Sidi line)?
My old Northwaves are due to be replaced. They're the sort that you can walk around in all day (they were my commuting shoes). Now that I have stopped commuting and have moved over to mountabiking, I'm thinking of getting something much more biking-specific.
Further info: I don't race. I ride very hilly terrain that only necessitates carrying the bike for short distances.