Camera with Built-in GPS Receiver - Advantages and Disadvantages

In Sony SLT-A55V (A55) you have a built-in camera GPS receiver to geotag your photos automatically. I have received emails from people, asking me, what are the advantages of using a built-in camera GPS device?

For a start, you need to know that only the Sony A55 has a built-in GPS device. Sony has released two translucent mirror digital cameras, the Sony SLT-A55V and the A33. Photographers want