I have been using i2crm for working with clients on VK, Telegram, and Instagram for six months now. The main advantage is that all conversations are gathered in one window, which eliminates the need to constantly switch between tabs. The response templates save a lot of time, and the ability to message clients first helps increase the number of orders. Connecting channels went smoothly, and tech support usually responds quickly, within 5-10 minutes. And of course, it's nice that there are no limits on the number of contacts.