We have been working with Zadarma for four months now. We connected a PBX with three numbers: one Russian and two European. It's very convenient that everything is in one system. So far, there have been no failures, and I hope there won't be any problems in the future either. We receive calls well; there are five of us in the office. I've heard a lot of negative reviews about Zadarma, but I can say from my experience that renting numbers from them is indeed inexpensive, and the PBX is provided completely free of charge. We didn't choose this service among all the similar ones for nothing.
