We live in a rural area and did not know that this water shoe even existed until we found one floating in the lake.  My husband just fell in love with it!.  It looked comfortable.  So I hunted it down on the net and bought it.  They have good arch support and best of all, great traction.
Last year, I had thongs.  When I walked out on the concrete boat ramp, it was like ice.  I fell back and got a giant goose egg on the back of my head.  I bought some cheap, local boat shoes.  The ramp was less slippery, but not perfect.  With these sandals, I don't slip at all!

I did buy a full size bigger and they were too big.  I returned them and got a full size smaller, which is the same size as my New Balance shoes.  The people at the company were most helpful.  They had the smaller size on the way as I shipped the large ones back.  This involved a double charge on my credit card until they got the big shoes back.  As promised, they issued a refund for the returned shoes.