I was suffering with plantar facitus? and was sent to see a specialist. She recomended these for me to buy and suggested they might be cheaper on the internet.
I had read a comment on site saying they were to big for her shoes, and yes they are very wide. Luckily I have clarks shoes for work which are very wide, but I have had to cut these down more than the lines for my size and I am having such trouble now as they fill my shoes and I cannot fit my trainer socks on with them, and because my shoes are filled with the insoles my feet can't breath, they sweat all day, so not sure at the moment if they are worth it.
The ones I was recomended for my foot problem was the sports ones, and I took my shoes to the specialist with me to show her, but I think I should have had another sort?
But apart from the size and my feet suffocating, yes they seem to help me walk much better.