Craig
I have not got one as yet due to not having the time to sit down to put one together. I think that they are a good idea because you can put the basic info on your leaflets, but include your web address in big letters for them to browse at your leasure. As to whether a single page over an all singing and dancing one with links is best, is something for you to decide.
Somebody told me once, a customer of mine whos a bailiff, that his relative designs them, but can fix it so they are always on top of the pile when a search engine is used. I.E carpets cleaners in Bristol, your's would be the first one. Whether this is true or not, i can't really say.
Another thing is as well, you can include lots of pictures on a website, but on an A5 leaflet you are limited. If like me, you only ever target the new estates, where on many occasions the young professionals live, so more than likely they would be frequent pc users.
Dave