Not worth the aggravation
I exclusively use the phone app on my iPhone to use the service. It is virtually impossible to create a separate address book for the business number. You can only give the service access to your entire phone personal address book. Since I don’t want or need to build an address book from my personal list, this is useless. It requires you to look up a number each time you want to place a call to a business contact. The service does not identify spam calls. Other than a modest fee for the service, I would recommend you look elsewhere for a business phone service.