I also use the Speedplay Frogs, actually have 9,000 miles on them, nothing had to be replaced. I like using a mtn shoe because of the walkability and the frogs were so easy to unclip because there is not spring, just twist and lift. However, should I ever decide to go with a road shoe I would go with the Speedplay Liteactions.
I also have never had hot foot problems.
~ JoAnn
2012 Specialized Amira S-Works
2012 Vita Elite
2011 Specialized Dolce Elite (raffle prize) - Riva Road 155
Ralaigh Tara Mtn Bike