I purchased a replacement gas hob with installation for my 8 yr old property. After waiting weeks for the installation, when he finally turned up the John Lewis engineer said he could not do it since he considered the ventilation in the kitchen was inadequate due to a conservatory having been built since the last hob was installed. We ordered an electric hob with installation by John Lewis instead. This time the engineer said the hob was too powerful to have the double oven on at the same time so wouldn't fit it! At no point did the John Lewis website give any guidance on power requirements. After reverting back to the decision to fit a gas hob and getting an independent gas engineer in to do the necessary modifications, I was informed that the ventilation WAS adequate. When I complained to John Lewis about the waste of time and money involved, they were unapologetic and refused any compensation. I expected better customer service from John Lewis, have cancelled my membership card and will never buy anything from them again.