Leaflets do work and are valuable investment. But as mentioned above someone has dropped 3k and wasn't happy with a result. YOU CAN'T JUDGE ON 3 THOUSAND LEAFLETS.
lets say yesterday I had a call from leaflet which I have dropped 3 months ago.
Got a job to do inside/out, lady had decorating in place last week so had to get paints and all the muck away. Total £45.
6 weekly @ £17
Booked gutters for @ £45
She was late for 1h, so knocked on neighbours while waiting, got to one off cleans Total £35
Had only dropped 1k in that area and had no phone calls for 3 months, but that one call actually brought business 7 times of my investment.
Leaflet champaign has to be well planed. ( has to offer several services to hit better target, windows, gutters, conservatory etc.) I will not bother with leaflets any more until I can drop 50k or 100k