Hi mate.
We use this kind of virtual phone number in Russia and, of course, this very very usefull and professional for the company.
Using web interface we could manage online perfect digital office service for incoming calls from customers - excellent greeting and information, different forwarding logics, real multi-channel mode, abilty to organise unlim quantity of company departments and so on. No staff need for that. Real office.
Do advice.
regards,
Vadim