Possibly just as impressive as the camera is battery life. Of course this mobile plays tunes, and from a full battery charge with music played from a microSD card I got eleven and a half hours of the stuff. That's good in its own right, but after the phone stopped playing music it remained alive for ages, giving a total of 15 hours 55 minutes of usable life.
This makes the phone an ideal double as a music player and the side mounted microSD card slot means carrying tunes should be no problem even if you fill the 110MB of internal storage. But Samsung's proprietary headset connector which shares the mains power adaptor slot rather scuppers your chances of using a better headset to boost sound quality. Really, on a high-end mobile I expect a 3.5mm headset connector.
Other features include a web browser, mobile email, Bluetooth, five alarms, voice recorder, editing and uploading of video and images, FM radio, RSS reader, memo maker, calculator, unit and currency converter, timer and stopwatch. It is a good stab at a large feature set, but if you want a five megapixel camera and a lot more features, then there are Nokia handsets which are worth a look.
In all likelihood you are going to be drawn to the G800 by its camera. Not up to dedicated digital camera standards it is still very good for a mobile phone. However, none of the other features are outstanding, and Samsung needs to learn about 3.5mm headset connectors.