I too think this is a good idea, i have already done it with office cleaning, i thought that as its thick like a post card and small the customer is more likely to keep hold of it, rather than bin it like a slip of paper. i know i would pin it on my wall if something like that came through my letterbox , i think the cheap looking leaflets tend to get binned without a glance, thats just my opinion though and sure someone else will say different, i have heard the cheap leaflets work well though, its all a learning curve, let us know how it goes.