I like mine quite a bit (WiFi only version). I've downloaded several books onto it, the entire first season of Curb Your Enthusiasm, and (of course) a number of apps. It will replace my laptop as my computing device on my next trip.

(I should note that when I travel, I rarely do much on the laptop other than sending email and surfing the web.)

Whether it's "worth it" is up to you, really. You could ask the same question about any number of non-essential products.