I really like this product!

You can make free calls between units, so if you have family at a distance that costs money to call, you can effectively set up free calls between the units.

Got Google Voice? You need one of these ObiHais at home or at the office to connect it to a phone and not need to have a computer on all the time.

Check the Amazon link for pricing on the Obihai. (support the VUC buy buying it through Amazon if you care to)

While the ObiHai product is a geek's dream with a zillion parameters to tweak, an ordinary mortal can set it up in a few minutes.