At first, I worried that the Mavica CD400 had a dead CD drive, as it refused to initialize the Memorex CD-RW it came with, which was brand new and sealed, and showed up fine in a PC.
However, after holding it at an odd angle with the lens barrel facing the ground, which put the CD mechanism parallel to the ground instead of perpendicular, it initialized the disc just fine! And since then, it has worked flawlessly, no matter what orientation I'm holding it in, it saves and reads pictures just fine. It takes them at 4 megapixels, these attached ones are in the 3:2 mode with a specific resolution of 2272x1520. The default 4:3 mode takes pics at 2272x1704. They looks pretty good, for something that's saving its picture to a dang CD!
It can also take video! Albeit at 320x240, but the compression really isn't that bad for MPEG-1, and the audio is surprisingly crisp, especially given it's a 32KHz mono MPEG-1 audio stream running at 64kbps.
This was a really clever sell for the time, given the standard capacity of an 8cm CD is 156mb, and you could grab those for nothing compared to a 128mb memory card in 2001. And these discs are actually 210mb, though I'm unsure if the CD drive can reach the very edges of the disc to actually use that space (may have been why it refused to initialize?)