Posting from a commuter train with my MiFi now. I love it. Very compact. I turned it on and tossed it in my briefcase, then got out my MB Air and logged connected. A simple, streamlined solution.

Activation on the other hand was for some reason a bear. I was online with VZW tech support and account support for well over an hour. I finally got disconnected and was able to sort it out myself by trial and error. Still not sure why it happened but it is fine now. The tech support guy acknowledged they have had training but I was his first customer with one and also I had a Mac. The problem was it kept was that it kept wanting to activate as a new device each time I used it. In any case, resolved now and working great.