Just like everybody else has commented, order at least one size up. I like to wear Smartwool socks when I kayak, and one size up is just barely enough. If you are a half size, go one and a half.
These are really comfortable, and I don't notice that they hold water. Maybe, it is because I wear socks. They fit well inside my kayak and are ok for walking short distances (e.g. scouting rapids). They have good traction on wet rocks.
Here is what I don't like, the velcro fastners come undone in a swim, I haven't lost a shoe yet, but they will not stay fastened when wet. I put another velco piece crossways around the orginal to keep it down and that seems to work pretty well.
Also, I have delt with TEVA customer service in the past, and they are first rate.