50 of 53 people found the following review helpful
Useful, but not superior to plug-in meter,
One reviewer assumes that this item is more accurate than a plug-in power meter. It isn't - the plug in meter measures both voltage and current, giving an accurate power reading, whereas the Owl just measures current, and not very accurately it seems, either.
Only gives consumption figure at the time, and multiplies up to an annual figure, which of course shoots up when you put the kettle on. Better models store historic data which is more useful.