I have the Samsung Chromebook that I just bought a couple months ago to replace an old netbook that I use when traveling and around the house. I am very happy with it!
Pros - Build quality is excellent
Battery life is great (6-8 hrs)
No moving parts (no HD or fan)
Boots up quick
Great keyboard and mouse
Cons -
All it does is run the Chrome browser
For what I use it for, I could actually have a Chromebook as my primary computer. I do everything online, so reading news, e-mails, browsing BITOG, paying bills it does all that. There are a ton of apps/extensions that you can install. Also, you can save files for use offline, and you can use Google docs offline if you want to type up a document or create a spreadsheet in flight. I save everything to Google Drive, and I have Chrome on my other computer so everything syncs. I add a favorite to one and it adds it to the other machine.
If you like using the Chrome browser and are mainly looking for something to get online with, this couldn't be any more perfect of a device.