I recently purchased the Delta 40, partly on the basis of the generally positive reviews and partly because I wanted to avoid cordless telephone answering machines. It may be that I received a one off ' rogue' machine, but the quality of the incoming messages was very variable and sometimes so poor that I had to listen several times to get the message. Also when setting up the speaking clock sounds as if she is saying 'em' rather than 'pm'. Initially I thought it was a distortion of 'am' and I rang the manufacturers, who conceded it wasn't clear. The plus side was that I had to ring the manufacturers twice and on each occasion they were very helpful. I ended up returning the product and even though it was out of the 30day limit, there was no quibble and Amazon returns system was very easy.