For another opinion this has worked flawlessly for me and I've even had to reroute or change a few deliveries and it worked out great. Probably not something I would pay for but the regular free membership is good and the temporary 'free' upgrade to premium is good to.
It's always confusing though when I get an email saying I've got an Amazon package coming and I didn't order one, that's when I know my mom is sending the kids something.