My BlackBerrys has either replaced devices I carried around with me at all times or shortened my time using them. I.E I use to carry a laptop, camera, and a cell phone. Sometimes I'd carry a radio and or portable dvd for my kids. My BlackBerry has replaced all that. Being able to email and use .xls on my blackberry all I have to do in the office is sync it to my pc and I'm done to spend time with my family.