"Ideal for secure online banking"4.0 starson by rlbr99362ks
Pros: No operating system so no way to install malware.
Cons: Only Cons if you are expecting a pc environment.
Summary: Anyone who follows http://krebsonsecurity.com/ will notice a pattern of many small businesses getting robbed of many tens of thousands of dollars; mostly because someone downloaded malware into the pc that is used to login to their bank accounts. The advice is to reserve 1 pc that does nothing other than banking logins. A Chromebox would be ideal for this purpose!
People are thinking of the Chromebook machines the wrong way. They criticize them for the effects of not having a traditional OS when that is their main benefit. Don't try to compare then to cheap pcs, instead look at the benefits of a machine without an OS that the user needs to maintain or accidentally infect.
Note: I don't have Chromebox (yet). I do have 1 year experience using my Acer Wi-Fi only Chromebook which I like (and I also have other Mac & Windows pcs too)