I think Answering Machine is not the best choice (at the moment)
I bought the 1.20 version, but I am not satisfied. It seems the best choice among its competitors, but it has stability issues.
Most of the times I use it it crashes at the end of the call and looses the recording. I saw others having the same problem, but it does not seem to affect any 6600. Other times it answer the call but the message does not start...
After a first kind answer from their support - asking me to verify that I was specifically using the 6600 release - I had no other feedback from them. It is not fair.