I got these guys to install a "Whirlybird vent". I told them that I saw them at Bunnings from "$98-$115" .I was told that they can get a better one for $170 etc.... So for $380 I got one installed and after looking at the box it was what was sold at bunnings an "Edmonds Supervent" for $115. If I knew that's what they were going to get I could have saved money and bought it myself. I could have paid for the labour but that was also extremely expensive. The Job took about 40mins. I must admit I was stupid for not getting quotes! Anyway that's my beef! The Job was ok. But I didn't like gaps between the vent and the tiles so I spend another hour blocking gaps!