For the accuracy of the instrument I can not say much, but it has been shown from the known to me current consumption down to the second decimal place. I think this is enough for any common consumer.
The service is not very intuitive - for a professional service reading the good guide is compulsory - but can the sought with some TRY + error every time out menu, click New.
The display possibilities are phenomenal: Thus, a high for the year account of consumption can be displayed after a short time - so it can be determined whether the promised consumption of a refrigerator is maintained for example (on the emissions sticker is always the annual consumption). The consumption of a washing machine passage can be displayed for example. So an accurate financial report any consumption is virtually possible.
Also nice is the illuminated display. Sorry, no permanent light-setting is possible.
What I would like to see more (for the successor?) Is a display indicating precisely with matching buttons. Otherwise, this product is really great and to be recommended without reservation.