Out of curiosity, how often do you use a Kill A Watt meter? $23 seems like a high price just to plug a device into for a couple days to say "oh maybe I should turn this off more often"
But, for general use by anyone not a EE or Electrician, hooking up a general purpose multimeter to mains power to measure current draw is a not recommended, much danger here, operation.
Therefore I erred on the side of caution and recommended the method that was most safe for all involved in all situations.
What I suspect you will find, however, is that you will find uses for the device that you never anticipated once you have one.
https://seattle.bibliocommons.com/item/show/2655545030_kill_...