T.F.
I use and like it. Like other posters, haven't seen any catches. Customer service has been great for me too. Many places offer rebates through sites like this or for donation. EBates is very simple to use. I like that they send an email every day to let you know of the retailer that is offering a higher rebate for that day. Then if it's something like a Shutterfly book I can wait for a deal from either Shutterfly or extra percentage from EBates.