I use it once in awhile. I have it set to send me the list in digest form. So I only get a few each day. When I have time I scroll down the list to see if there is anything I'm interested in. Sometimes I get something, sometimes I'm too late.
When I get rid of something. I list what it is and say it's in front of my garage. I don't want to wait around for someone to show up. I usually do this on the weekend when we'll be home anyway, just to be a little safer. When it's gone, I get back on and post that it's gone. This seems to work out well for me.
We gave away two bedroom carpets and they were gone in three hours!
When you keep in mind the reason, to keep something from the landfill, it's a pretty good thing.