The work on this occasion was a boiler service. It was done just as you would hope. The engineer arrived at the time we had booked, the work was done very considerately (our boiler is in the middle of our hallway so we were coming & going a lot around him, but this didn't cause any problems), and no mess at all. The booking of the appointment, and invoicing afterwards, was easy and efficient. Gasworks have been working for us for around four years and every piece of work has been to the same excellent standard - our boiler installation, boiler services, and a few other things. On a couple of occasions we've had leaks (not from any of their work, but from older plumbing) and they've come round quickly, and sorted the problem sensibly without trying to suggest lots of expensive / unnecessary work. All their engineers, and their office staff, have been unfailingly friendly and cheerful. I couldn't recommend Gasworks highly enough.