What is important for you when choosing a PBX?

And again we are interested in your opinion, dear habroses.

The background of our survey is as follows.

Last week there was a meeting of our sales managers, developers and managers with one of our very first clients. He has been using WELLtime IP PBX for almost 5 years (at that time he acquired it with the old name WellTone).

We had the pleasure to communicate live with a person who has long and densely worked on our system.
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Vladimir told us about why he decided to change the usual hardware PBX to our system.
His business style is based on high-quality processing of incoming customer calls, implemented in the “two lines”:

• secretary
• managers who directly process clients by the received phone numbers

It was important for him to have a stable system, which does not require large expenditures when it is necessary to reconfigure.

Very nice, lively emotionally told us about the impressions. Thank you so much for participating in our meeting! I admit, was captured by his story!

It was then that it occurred to ask the habroops, but what could be of interest to them when choosing a PBX? What functions, opportunities, prerequisites (financial or technical) can play a crucial role in choosing a system?

Share your thoughts!

Thanks in advance for the answers!