I've been used Packet 8 for two years now and just love it. My phone bill for all local and long distances calls in the United States is $20 a month. I was first introduced to VOIP through my Melaleuca benefits.
We've used a regular corded phone with it and cordless phones - no problems whatsoever. I even unplug my phone and plug up my fax when I need to - and still have no problems!
here's a blurb from their website www.packet8.net
Packet8 is an affordable and easy-to-use broadband telephone and videophone service. Designed with both residential and business customers in mind, Packet8 allows anyone with broadband (high-speed) Internet access to use their regular phone to make UNLIMITED calls to anywhere in the U.S. and Canada for as little as $19.99 per month. Packet8 subscribers with videophones can make video calls for as little as $19.99 per month. All Packet8 subscribers get world wide UNLIMITED calling to other Packet8 subscribers at no extra charge. Calls to non-Packet8 international numbers (outside the U.S. and Canada) are charged at a very low per minute rate
Because I joined them through my Melaleuca account, I was not charged for set up and got free delivery too!