"There are some features I'd like to see: the ability to set a "quiet time" when notifications aren't sent or a giant "silence switch" would be fantastic. But all told, Boxcar pulls of everything with flair and ease. The interface is slick, the services work wonderfully, and I love getting my notifications. And then there's the fact that it's free-well, for the first service, anyway. You'll have to pay $0.99 for extra ones. But honestly, Boxcar is by far the best Push notification app I've used, and it just works."