I found the promise of installed within a week to be sadly unrealistic. For the cost of what is a simple socket with a 1970s knurled keylock and a little cable I expect more customer service. All surveys etc require the purchaser to photo and submit to Chargemaster, the only visit was from the installation electrician (incidentally a really good guy and efficient, the only reason I awarded2 stars). Anything in the least challenging requires the homeowner to sort before Chargemaster will commit. I had to get my own electrician to fit a separate RCD and isolator before CM would commit to an installation date. The one thing they did quickly was get my details for the grant funding element. Now it is installed and my car delivered I am glad I have done it; the charging on the drive is easy and already a habit. But Chargemaster please make an effort on customer service for a simple product that costs the best part of £1000. I am a senior professional Engineer, do most of my own DIY and could envisage making one of these units and fitting it myself, however strings of emails up to 25 long remind me of a torturous route to getting this done, and I wonder how others less informed in practical activity might fare.