Vice President of Google Earth Even Wrote a Review

Brian McClendon
http://exilim.casio.com/digital_cameras/Hybrid-GPS/EX-H20G

When standard GPS loses signal inside, Hybrid-GPS is always tracking so you get accurate geotagging whether you’re on top of the Eiffel Tower or deep underground in the London Tube.

""The precise Hybrid GPS technology found in Casios new EX-H20G overcomes the limitations which consumers face with current GPS-enabled digital cameras, specifically the ability to geotag images indoors. The ability to automatically add location data to more photos will be invaluable to those who share geotagged images with friends and family on platforms such as Panoramio or Picasa.""

Brian McClendon
Vice President of Engineering
Google Earth and Maps

Problems:

NONE!
See: http://exilim.casio.com/digital_cameras/Hybrid-GPS/EX-H20G