Love, love, love it! It's basically become an extension of my body, LOL.
My sister gave me one for my birthday last year, and my first thought was "I have an iTouch...what do I need this for?"
Turns out, I had no idea what I was missing!
Over the past year, I've spent many, many hours in waiting rooms (doctors, hospitals), and this gadget has been a godsend. I've always used fairly large handbags/totes, so it's no problem to carry it with me.
I use it for:
~ Accessing the internet...for DISing, Facebook, email, etc. (through WiFi, not 4G - but WiFi is everywhere these days, so it's rare when I'm not able to connect)
~ Books
~ Music
~ Games
~ Photos
~ Movies and TV shows...downloaded from iTunes and streaming via Netflix
~ Vacation planning...I upload my touring plans, flight and hotel info, ADRs
In short, it's pretty much the most amazing thing EVER!