I have a sandisk brand SDHC class 2 memory card, with some video & photos on it.
2 things or problems I had right away with it
1) when the card was in the card reader it could not even open it, windows did not see it.
2). Not all of the video was downloaded, the .mov movie files were, but not the AVCHD movies I took.
I am on a dell pc running windows xp home edition service pack 2, & I used a photo program called downloader pro.