Decided to get these for ocean swims while on vacation. Biggest disappointment was size,  I am a size 8 dress shoe/9 running and got the mediums as recommended.

They were not snug when I tried them on at home.  They filled w/water during the swim, which may also happen in a smaller size since the are a waterproof sock .  

Otherwise I was extremely comfortable in the water even though it was 'warm' (65 degrees give or take).

I would recommend these but get them so they are snug.

I use them everyday at work, since i work with water, there very confertable and fit perfectly. The only downside is there arent any orca water shoes to go with them.