Very straightforward, the government grant form was straightforward and clearly explained, EO customer services are helpful and efficient and answer calls straightway, being able to call and email a specific individual is very helpful. The install was carried out within 2 weeks and very professionally done. only negative is that the cost is a little high at £545 after the government grant and Octopus discount, but I think this an industry norm at present until there is the demand and economies of scale I expect this pricing is the only way the product is viable.