I like most is that it allows me to have my own personal phone number as well instead of using one provided by another carrier or provider which has limited minutes per month/per year etc..
It also gives us access via web chat in order not be distracted when we are working at our desks (as opposed to other providers who require constant communication). This would include any emails received while offline being able receive them upon reconnection too; however this does cause some issues if your email client saves all sent messages locally but then forgets those items prior leaving an internet connection available where they could've been retrieved had there still actually exist such files saved localy! If anyone wants reliable voice & data connectivity without having their bill skyrocket because its "premium" plan doesn't allow unlimited usage each billing period - use voniX!! Yes i do enjoy how easy managing everything through online portal vs dealing directly over landlines / cell phones.