The actual quality of the device looks good but sadly the box that sits internally next to the meter was faulty on arrival but the engineer was able to resolve the problem by having the necessary spare in his van. I had a problem which was frustrating on the engineers arrival because as instructed when originally ordering the device I took lots of pictures as instructed some two months before the installation and stated that I didn't have an earth on the main water pipe but nothing was advised to correct this so when the installer arrived on the day of installation he said I would have to get an electrician in to fit an earth. The box itself has to be positioned between set height restrictions (I am presuming that these heights are set by a govt body and not EO themselves) and because i went for the Tethered option (with the cable already attached to the charging unit) the cable just sat on the floor so EO very kindly organised to have a hook fitted above the device to allow me to wrap the cable round and keep it off the floor. This shouldn't be a problem for most users because I believe that most customers are going for just the box and therefore benefit from the really small footprint of the charger so it can be rather discreet unlike some of the other larger units available on the market. So far EO have responded brilliantly to any calls I have made so it appears that they have invested heavily in the quality of their staff. The app is also very good and easy to use