[Inskip1991]

Has anybody ever used one? If so was it worth it?

Haven't got a lot of time myself so debating whether or not to hire a company to do it.

[wind-o-brite]

In my experiance so far you will pay a canvaser around 2x then you will probebly lose 20- 30% in the 1st clean or 2 , and ditch anoughter 20% so you will only keep 50-60% , so in the end it will cost you about 4x
mybe ul pull a bit back of your canvasser if your lucky and keep it down to 3x
plus theres all the hasle of dealing with time wasters ect .

sometimes its better to buy something established you can grow on

[PURER CLEAN]

In my experiance so far you will pay a canvaser around 2x then you will probebly lose 20- 30% in the 1st clean or 2 , and ditch anoughter 20% so you will only keep 50-60% , so in the end it will cost you about 4x
mybe ul pull a bit back of your canvasser if your lucky and keep it down to 3x
plus theres all the hasle of dealing with time wasters ect .

sometimes its better to buy something established you can grow on

true that 

[SB Cleaning]

In my experiance so far you will pay a canvaser around 2x then you will probebly lose 20- 30% in the 1st clean or 2 , and ditch anoughter 20% so you will only keep 50-60% , so in the end it will cost you about 4x
mybe ul pull a bit back of your canvasser if your lucky and keep it down to 3x
plus theres all the hasle of dealing with time wasters ect .

sometimes its better to buy something established you can grow on

true that 

Yes it is

I used one a few months ago cost me 2.5 x I had a similar experience to what's been said above, if you can deal with the time wasters and some crap jobs its worth it!

I have picked up alot of work in the areas since as well