It certainly isn't the greatest microphone / speaker combo in the world, but I was able to carry on entire phone conversations with listeners on the other end unaware that I was using a watch to talk to them. (pcmag.com)
But few predicted that Apple would also hike the price of its entire phone line. (fortune.com)
This also takes care of the fear that your business may lose its entire phone system if the computer or internet goes awry, but if incoming calls get automatically transferred to cell phones or other landlines, that problem is eliminated. (smallbusinessesdoitbetter.com)