Inexpensive and easy to use. After 3 years of heavy use we are experiencing the following problems: 1.  Screen problems requiring screen replacement.  2. Monitor cable from mother board to screen excessive wear causing screen to not display properly requiring cable replacement.  Keys detaching from keyboard.  Key attachment beds develop bent tangs preventing replacement of keys and then requiring entire keyboard replacement.  Clearly if Chromebooks are to be used in an educational environment, you need a life cycle replacement program.  Up until end of life there simply are no issues.  They are reliable in year 1 and 2.  In year 3, expect issues (under heavy use).