I really like efficiency and I love these outlets with both 110 volt power and low voltage USB. You no longer need wall adapters and charging your phone in your kitchen no longer uses up the outlet space. They also charge with fairly high amperage meaning it takes much less time to get your phone or Ipad up to 100%.
Installation is pretty simple as you just turn off the breaker and move the wires from the old outlet to the new one. If you don't know how to do that you really should invite a friend over who can teach you the basic fundamentals of electricity. It is good knowledge to have in the back of your head.