Pros: Call quality is great. Customer Service is exceptional. Plus I can use it from my cell and home phone.
Cons: I wasn't able to get through to a number in China a couple of times, but I called Customer Service and they took care of it. I couldn't believe how polite and efficient they were.
Summary: I have been using various services for both personal and business use for a while. I call mostly to Europe and sometimes China. Calling cards are a joke so I switched over to CellularLD a few months ago. I needed something very reliable especially for my business calls.