There is much to be said for the simplicity of a dedicated device. The Peek, which we included in our holiday tech-buying guide, can be thinner and sleeker than today's multipurpose wonders because it only tries to do one thing. The Peek is all about wireless E-mail. That also makes it easier to use, with minimal menus and dedicated buttons. It's such a relief to get a period or "@" symbol with one button rather than the multiple taps it takes on most smartphones.