Hi
I use a company called AlldayPA for an answering service, and they recently started some kind of incentive thing to get current users to recommend their services.
I have no complaints to make of their service, which is friendly, professional and courteous, but as my business has increased it's become a significant monthly expense, averaging about 160 a month over the last three months against 1/4 of that when I first started up.
Although it's not for everyone, I weigh the cost of the answering service against the cost of not getting the calls and I'm currently keeping it running, although I (naturally) take it off on the increasingly rare days that I'm in the office. A cheaper company, or so I'm told, is Call Sciences who are based in Slough and are an american company.
Callum