I always only wear New Balance so I was excited to see that they made a water shoe.  Many reviews had suggested that I buy a 1/2 size larger than I usually wear.  I bought the 7 1/2 rather than a 7.  In length the shoes fit however they were too wide and my foot slipped alot (I do have a pretty narrow foot though).  The only way to get the shoe not to slip was to tie it as tight as I could which made the mesh pull and pucker which didn't look good.  All and all it would have been a great shoe, just not for my foot.  I ended up sending the shoes back and getting the New Balance 820 water shoe, it worked must better for my narrow foot.