Anyone have Amazon Warehouse experiences?

I just discovered Amazon Warehouse items and I cannot stop looking at things online now!!! Does anybody have any personal experience? Have you enjoyed your purchases? The online blogs and posts I've read all say positive things. For those of you who don't know what I'm talking about- when an item has "other sellers" listed, click on it and sometimes it has Amazon Warehouse as the seller and the items are cheaper. The descriptions say "Open box- Good" or something similar but if you look at what that means in the description or on Amazon's page, it basically means it's just an opened and returned item. Sometimes not even opened! Here's an example-