I don't want to be too hard on Pes Energize, personally I love their internet service. It may not be the fastest but it's high speed and cheap and you can get free long distance with it which is great.
However I have had many problems with the phone service. It's not uncommon for there to be strange noises, voice echo, dropped calls, one sided dropped calls where one person can't hear the other but they can hear you. It's very frustrating.
One who's more paranoid, or one who reads the news, might think it's the NSA doing a really crappy job at spying on long distanced calls, but I'm pretty sure it's Pes Energize.
Like I said, I love my internet, and it is cheap, but I wish I had a better phone connection.