The actual installation was fine, the young man that came was very polite and helpful, he worked hard (never even stopped for a cup of tea!) and left the job neat and tidy. My problem is with the app, it is absolutely useless, after many phone calls and e mails (most of witch they never reply to) they replaced the unit, exactly the same problem. Basically the app says the car is charging when it is not and vice versa at present it says that i have been charging for 430 hours! on one day it said i had charged 6 times, 4 of those times for 0 mins and the other 2 time for 4 mins each time and costs for the last few weeks are Zero! I have now heard back from them to say that they aware of the problem (they say it is only in certain areas) and they are working on a cure and it will take between 4 to 5 MONTHS! for a company the size of chargmaster and backed by BP it is pathetic.