Basically as it says in the title. I had some issues with one of our windows (crooked in the frame because of a storm and needed new handles), it took three hours to fix, and I was presented with a very high bill (I won't mention the amount yet because I don't want to influence the answers). I am in the London area, so used to paying extra, but woah. Just wondering what you would have guessed is reasonable, because I feel like I was so far off and cannot decide whether I am being cheated and should pursue it.