Mike McGarry

As I mention above I have no Pros for this device. The negatives are buying a device you expect to work, and when it doesn't the advertised customer service is all but unavailable ( it took me four weeks to get a response from NeTALK). It is a good idea, just poorly executed when NeTALK's excuse for nonperformance or functionality is that the problem is either your phone or your internet connection.
The warning I got from their customer service department is that their device may or may not work with any given telephone or internect provider. Based on that I would not invest the time or money as the frustration level is not worth the price of admission.
The problems with the unit is that once a call is dialed it may not go through, it just goes to dead air space. Sometimes it will go to a fast busy signal other times it will ring once and a recording will answer saying the number is not available right now. I validate the above three scenarios to be 0 by making the same calls from a landline and they go through immediately with no problem.
I conclude with the old adages of "Buyer beware" and "You get what you pay for". AVOID NETALK DEVICES.