I have been with Answer for several years now. I do not receive many calls but when there is an enquiry to my business I am sent a text and e-mail straight away and I can then ring the person straight back.
Each time I have rung to keep the service active or to speak to someone, the person introducing my company has always sounded professional and, at all times of day, evening and weekend, even Bank Holidays, the phone is answered quickly and professionally. It also only costs me less than £40 per year as I do not have many calls, but it is well worth it because I never miss a call.