In Nice all was OK as we have 3 eSIMs for the whole family and we got connected immediately. When we entered Monaco all the issues started. Coverage is not good at all and the service is provided intermittently. Let me describe it - the same happens when you are on a WiFi at home and you leave your home and lose your coverage. This is what is happening all the time. Also in Country Club Monaco no coverage at all and this is a part of France, not Monaco. It is impossible to use it so we all switched to Orange provider in Monaco with Holiday package for 44EUR each.
Avoid this provider at all cost as you will be unnerved as my whole family was by using them!