I will add my complaint to the list here. We switched from Vonage last year to Xfinity voice. Since that time we have our landline calls drop. There doesn't appear to be any consistant time into the call. Sometimes it is in the first 5 minutes, other times it is 20 minutes into the call. No click or static, just the call stops and silence.
I also am having issues with dropped calls. I just signed up for voice, along with internet and tv a couple months ago. I have been having nothing but problems. Xfinity customer service is horrible. Though it will cost me more, I am going back to Verizon.