The ease of use, great customer support and ability to manage from anywhere via mobile app is what I like best about this product! There isn't anything that I dislike at all.
It's been an easy transition for our business from traditional PSTN lines to using Voip over WiFi or cellular connections. We are able to easily integrate into existing PBX systems as well. This has allowed us to make calls without having to rely solely on cell phones which reduces risk in case someone loses their phone or needs assistance during emergencies.