I have used the magic jack on my netcomm router with success.. I have home phone too , and OFTEN people think Im calling from inside a CAN.! Very tinny and echo..that is the ROGERS service!!!!!!!!!!!!!!!!!!
Try Skype first, 3 months anywhere in North America for $8... yes you have to use a mic and headset, but if this works for you then using a magic jack shouldn't be an issue.
I did some searching on the net as to how much bandwidth would be used when using a MagicJack device. It appears that the device will burn 1 GB for 64 minutes of talk time. I use the phone service attached to the rocket hub and we use in the area of 1000 minutes each month. That usage converts to 15.6 GB of bandwidth by using a Magicjack. I use internet up to almost 10GB each month so the Magicjack bandwidth would become an overage charge and amount to an extra $78 just to use the phone. This does not make using a Magicjack a feasable option let alone any other voip device or software.