Started with Xfinity Mobile last July and still love it. Have the $12/gb/month plan and rarely go over that. When we do, like this month when we're away and have limited access to wifi, we still only pay $12 for each gigabit of data we use. No large overage charges. Way less than what we paid with Verizon and we still have access to the Verizon network. Not leaving anytime soon