Appearance of: solid and the corresponding task
Features: I think that the device probably offers everything functions that one wishes relating to a comfortable consumption measurement / calculation techniques. It is the simplest variant cover (insertion and reading of consumption in watts) to the storage of several consumers and of inputting the specific consumption rates, which are then used by the device to the projected annual costs. The backlit display makes the use in corners and niches, behind the refrigerator, etc. very easy. The numbers are large and therefore easy to read.
Ease of use: The start is to master simple and without guidance. In other features, the manual is helpful and probably necessary given the large number of functions.
Whether these are sufficient or one of the simpler versions of the device, probably depends not least on the frequency of use and the claims. An operation of the device without connecting to the network for about 30 minutes, however, I found very beneficial.
