For the $? They are alright I guess. Its a pretty easy experience getting everything running out of the box. I actually really like Chrome OS, its minimal and elegant. You can run full Microsoft Office if you are savvy enough

https://groups.google.com/forum/#!topic/chromebook-central/gbsN9L6k9D4
I actually had the C720. Its a lot better looking online, and not so premium out of the box if you know what I mean. Its still pretty good for $200, but the storage is abysmal. Really have to rely on WiFi, unless you intend on upgrading space.
If you would not mind a tablet, I recommend the Blackberry Playbook. Cheap, Premium, and Zippy! Its really a nice all around experience.
Let me know what you want to know about the C720.