They dont need to use the doorbell when they arrive
(driving sensibly). lolI would say if going to use the car as a daily driver the mongoose will make you more tired by the time you get somewhere cos of the bass/drone even doing
motorway cruising. I have also noticed it makes us less tolerant of other road users doing something stupid. 
Prefer to get somewhere without the fatigue/stress caused by the exhaust.
Must be getting older. Yeah I prefer the oem exhaust lol