We had the 350mb, but it couldn't handle everything in the house (3500sq ft). So we upgraded to 1G. Nice.. no problems - - 8 Google Home's, Nest learning thermostat, Phillips Hue, irobot Roomba, three Xbox, seven phones, two computers, and more. No delays or buffering.
Hi JpDunbar, thank you for taking the time and post your experience here on the Xfinity Forums and glad you like your new Gig service. If you have any questions in the future please let us know and we will help.