This is a very interesting topic and thanks for starting it and thanks also to those who reply.

I suspect that the wading shoes makers these days are trying to make their shoes so light that they don't provide the kind of comfort I get out of my hiking boots so I'm certainly going to give insoles a try!

I plan on taking the insoles with me when I purchase new wading shoes end of summer (on sale!) to make sure I get the correct fit (I always take my waders in when I buy new shoes also).