I bought a talkie for my two older daughters (ages 8 and 6). That was three weeks ago, and they still play with it everyday. That alone is pretty special - our house is cluttered with toys they have played with for a few hours and then never touch again. It's particularly great when I'm traveling or just late coming home and I can leave them a message to let them know I'm thinking about them, or ask them what they want for dinner, etc.
The app is not perfect, but it works, And the company does seem to be responsive to customer feedback and is continually pushing out updates.
I convinced some friends to buy it also for their kids, and so my daughters are now excited about being able to connect to their friends now also too. Great toy.