I have the book and love it, I use it all the time. I keep it in a kitchen drawer b/c I cook a lot from scratch and I don't have a computer in the kitchen.
Most items come with nutrition labels, but a lot of them still don't, like veggies, fruits, meats, etc. I'm constantly looking things up on it. If you're counting calories it's a great tool. I had originally purchased it when I was doing WW, but the fiber wasn't listed so I didn't use it much, but now that I'm counting calories I couldn't be w/o it.
You made a great purchase, plus it's small enough to carry it around!