I set up the MegaFon Virtual PBX for a small company with several branches in different cities. At first, everything seemed quite simple and clear. However, in practice, the situation was far from ideal. First of all, I was disappointed by the terrible call quality, which is absolutely unacceptable for a business. Thus, the MegaFon Virtual PBX cannot boast of stability. Another drawback is the slow account replenishment, which takes about 5-7 days. On the positive side, there is integration with Bitrix and the ability to easily record calls. Nevertheless, I cannot recommend this virtual PBX, as choosing MegaFon puts you at risk of encountering unpleasant problems.