Ranked in these QuestionsQuestion Ranking
Pro Easy to use
If you can use the Chrome browser, you can probably use the OS as well. Chromebooks were designed for pretty much just browsing the internet, checking emails etc.
Pro Low price
Chromebooks are very affordable, some even go as low as $200-300.
Pro User friendly
Chrome OS has a built-in anti-virus(and malware) protection. It gets updated often.
Con Perhaps too simple
Odds are, this is is a non issue, but occasionally the people I have recommended chromebooks to have been frustrated when they have wanted to do something a little more complicated than what I expected them to want to do.