Who used the octoline.ru service, pros and cons?

Question

Telephony

There was a necessity to put the automatic telephone exchange for mini office. Local solutions are not suitable for some reason and began to look at external solutions. I came across a service from octoline. Perhaps someone used this service and will be able to tell about the pitfalls, or advise a similar service. A very important point is the Volgograd city number.
UPD 1. Octoline is no longer considered an option - they terminated the contract with the Volgograd Telephone Company.

Answer 1

a clear minus - support, two days did not answer =)