I've owned the Camedia 550 for a little over a year. I am very disapointed in the software that you HAVE to use with this camera. I upgraded to the "professional" edition, but it's still bad. It does not alow you to back up your photo's onto CD. (Floppy Disk Only, which is worthless). Also I have pixels dying on my viewing screen.
It is difficult to manuver through the options on the camera. Also uses a Smart Media Card, which the new ones do not use, and very few new camera do use, so I'll be stuck with $200 bucks worth of Smart Media Cards when I decide to chuck this thing.