Product summary

The pros: Skype 2 is free and easy to install and set up. New features such as videoconferencing; toolbars for IE, Firefox, and Outlook; contact groups; mood messengers; and avatars, sounds, and ring tones are added.

The cons: When using SkypeOut and SkypeIn, Skype 2's voice quality is not that good.

Though Skype 2 has a poor voice quality when calling landline phones, it's still one of the best free VoIP services around, and its new Skype Video feature makes it even better.

I found this VoIP review comparison chart of the 4 most recommended VoIP provider.

They have good features, pretty good sound quality even if you have slow internet connection, low prices, etc. but there is a very big problem with its customer service.

Customer service is very bad. These people in India don't even have any clue how to provide service to its customers at all. All they do is read same script and blame every thing else.

Also, Vonage seems to be adding additional charges to the monthly bill some line items include Regulatory Recovery Fees , Federal universal service surchage. These items are not charged by other VOIP providers such as AT&T Call Vantage service.