In January 2012 I purchased a pair to take on a cruise.  We were climbing Dunn's River again and I needed a more reliable water shoe.  The last ones I took to Dunn's River were a disaster.

Speedo is a reputable brand so I decided to buy them.  My first pair were all pink (the cheapest color at the time). I wear a size 6 and I bought a 6.  The shoes run true to size.  I have a little room in the toe area, but that's how it should be, I don't like wearing shoes that fit really snug or will hurt my toes after moving around in them for a significant period of time.  Even with the room, my feet didn't really move around.

Some of the other reviews mention the bottom liner moves around. It does and is removable, but it didn't move around so much that I felt unsafe in them or that I was uncomfortable wearing them.

I just recently purchased the black and turquoise because I didn't properly allow the shoes to dry and because of that they got a "mildewy odor."  I even put them in the wash with lots of detergent and fabric softener to get rid of that mildewy-smell, but to no avail.  I use these shoes often; I wear them in all pools as well and at the Jersey Shore.

For the pair that I have now...after each use I run them under water, take the sole out, and let them dry completely.  That has certainly helped.