Quoted work for just gas related things, then had a plumbing issue the night before. Thwy added that to the job and made my day better, all within original cost estimate + parts costs. Friendly engineer happy to explain and talk through it all, so o feel i understand what has been done and why it's been done. Will definitely use again if i face other gas or plumbing concerns, especially as the plumbing bit was added the same day they came out.