Many people stay away from 'third party' memory cards. In some cases, this might have been a good thing. People often have complained of lost games, corrupted memory cards and games that wouldn't work with certain memory cards that used compression.
MadCatz' 8MB Memory Card doesn't fall in that category. While it is made by a third party company, it is an officially licensed product of PlayStation. And, while it holds 8MB of memory, this is the standard size of a PlayStation 2 memory card. So, what you get is a solid, high quality memory card with 'third party' unique styling. In this case, our review unit had a black and transparent blue plastic casing. After hours of use and many saves, I have had no problems with the MadCatz 8MB Memory Card at all.