Whilst the engineers worked well I think they would have gotten better if they had been provided with an idea (any idea) of what was expected. I was horrified when they said pipework was to be routed through the house involving the lifting of three carpets together with the relevant floor boards. A phone call to head office advised that the plan was to route through the garage, thus negating the aforesaid disruption. I was not aware they would need to remove a tank from the attic and only discovered it three days after they had left when two boxes of Christmas toppled over during the night. The attic being floored they did not come through the ceiling. I will find out if any are damaged come December. It could have been a whole different story if they had moved over £2000-00 worth of cut glass crystal glassware I also store up here for Christmas. They also left piping behind in the attic. I know they had to access every room in order to change the radiator valves but I did not expect to have to remove dirty finger prints from both sides of every door. I gave the engineers carte blanch make a drink when they wanted but was annoyed when I found they had left a nearly full two pint bottle of milk on a work surface in full sun light on a hot day. The job was supposed to take two days and took three. All in all not a satisfactory experience, unlike the alarm engineer who arrived at the same time, worked around them and was gone in half a day.