I use them for around the shale beach and water. The liner that comes in it is loose and doesn't stay in the shoe. I finally removed it because it does hold the odors too much anyhow. I think for the $$ they would be a little better quality. It surprises me how much my feet do sweat in them being that they are vented and my feet don't sweat alot normally.
Update 10/13: Just tossed 'em due to broken heel strap that you NEED to get them on. I have very little use on these and I'm am really unimpressed at the build quality for the $$. Absolute garbage, I've had $30 shoes last better.