[asterisk-biz] Key selling points (or) USPs for Asterisk PBX

Hello all

I am new here. I am currently doing freelance Asterisk work in Chennai, India.

I would be glad to hear from the experienced members of our list as to what they define as the best things about adoption of Asterisk instead of proprietary  solutions.

I myself list (pitch to prospectives) on freedom from vendor lock-in, features, flexibility and of course cost.

Regards

devafree
(R.Mahadevan)