We started using Zadarma when our team was only three people, mainly to avoid using personal phones for client calls. Over time, as we hired more staff and started receiving a higher call volume, the system scaled smoothly without forcing us to change providers. Adding new numbers and extensions was quick, and call routing rules helped us direct callers efficiently. Call quality has remained stable, even during peak hours, and the call logs are very useful for follow-ups. The interface isn’t the most modern visually, but it’s functional and reliable, which matters more to us than design.