depends on the amount of business/type of business you are after, and the level of advertising you are doing, not amazingly expensive to get, about 100-200 setup and a set fee for the month gives you upto 500-600 mins free, about 15-20 quid a month i think, but if you are just leafletting small houses i wouldnt bother, if you are going for loads of work, and big commercial etc, etc it will help maybe to get the extra odd call, but i only use home number and mobile and both ring pretty frequently, but like i say maybe theres one or 2 more who would pick up for a free phone number??