A fantastic pair of flip-flops. I have had them now for 2 months and worn them most days. Even now after the egg carton foam has bedded down they make a very comfortable flip-flop.
As for sizing I'm normally a 9.5 (so getting the right size is normally a pain). The 9's were very tight, as for the 10 they fitted nicely to start with but have loosen off after a bit of wear. When the foam compresses the flip-flop feels like it's grown about 1/2 a size. Even with this they feel like a slightly loose but very comfortable pair of flip-flops.
I would definitely recommend these flip-flops but if possible try the sizes before buying.