They make a ok machine. If you are just going to use if for basic home use it should be fine. At&t seems to make a higher quality machine. It depends on how much you want to spend. Another brand worth looking at is the Casio Phonemate Digital answering Machine.
The GE 29875GE2 is an exceptional answering machine, that is also very cheap. Some of the features include, access to messages, and the ability to save and delete selective messages.