I'm not sure why everyone is so gung ho about Sparrow, the reviews haven't been good and my personal experience using it was that it was a very underwhelming product. It doesn't offer the whole set of gmail features, and for anything other than gmail it's even worse. I thought we'd all moved on from thick-client email apps. Admittedly gmail on IOS is awful, but since gmail supports exchange access, it's possible to use the built in email client and get push notifications. Even before Sparrow was acquired, teh reviews were less than stellar.<p>Everyone keeps trying to change email, let's leave it alone, it works fine, its one of the few technologies that has lasted any length of time and still be on top. nntp, gopher, etc all faded away, but pop, smtp, and then imap have flourished and become the de-facto way the world communicates.