I agree that the vendor choice will greatly affect if you 'like' or 'dislike' the phone system you choose.

Check the BBB for complaints. Ask for customer references of recent installs of the same or similar system. Make sure they have an adequate training program to show you how to use all the features.

My personal recommendation would be for an IPKII with an Elitemail voicemail. I would NOT recommend the INMAIL voicemail.

D