I asked that question last year mate and got a mixed reply from them, so i actually havent used them but they seem to have good and bad suport from here. The only advice is go out and do it your self, if you realy want it you can get it, i went out and canvesed 2day as the weather was bad come 12 ish and got myself 11 houses thats near 1000 pound a year for 4 hours canvesing, if you stick at it and work a full day canvesing im sure you will have a round built in no time.
hope that helped Keith