I recently had the WORST customer service experience I have EVER had, while asking AT&T to do some very simple things as part of closing out my father's house. Not impolite, it just took hours and hours of confusion, ineptness, and tedium on the phone to accomplish a few very simple things. I never did manage to get a final statement from them. Wherever there is an even halfway reasonable alternative, I'd avoid.
Excuse the rant,
John