Pros: Excellent call quality; convenient email billing and pay through bank or credit card
Cons: None except not the cheapest for intralata calls
Summary: I have been using OPEX for about 3 months. The transition was painless as OPEX gave me precise instructions for dealing with my local carrier, and the service has been flawless. I tried to get Pioneer service, which has lower rates for intralata calls (not out of state), but it was not available since I get my local phone service through my cable TV supplier. I chose ebilling and autopay through my bank, so there are no extra charges except the state taxes and universal service fund. I am confident to call overseas, also, because those rates are all very reasonable. OPEX also offers rebates for referring other customers, but I have not used that service. Overall, I would say OPEX delivered just what they say. When necessary, you can also get a real person to help you.