Do your legs kill you after wearing them as I have heard this from some people, even heard in a shop people tired bringing them back because of this - they thought they were faulty
No, but ( excuse the pun ) I haven't used them too much yet.
I googled them and there are various views on how/why/if they work.
For me its the comfort,unbelievable.
I was discouraged to read that a lot of people found that the air bubble burst,from a tack/nail and that there was no way of repairing them.