I have the card and it does work. Every 100 videos or so I will have the "recording has automatically stopped" issue, but the card does work pretty darn well IMO.
This would be totally unacceptable to me. What if that 100th or so was the once in a lifetime shot you could never hope to see again?
From April-August I probably shoot thousands of video clips, so my camera gets a lot of work in the video department over that time. It does stink because during that time I am filming live events and can't have re-takes for when it does have that error, but still, its successful 99% of the time and I am ok with that.
I have seen several "tales of woe" concerning what would be just that 1%. If you're not filming those live events for a "client" then I guess it wouldn't matter that there was no possibility of a "retake". I shoot mainly for myself but still would regret losing a take because I didn't pay a bit more for better and more reliable media.
I use SanDisk media and have NEVER seen a recording stop. Canon techs often suggest a switch to SanDisk Extreme media when they hear a customer call and complain of just this. Problem "goes away" for those who follow that suggestion.
I have the 32 bit card and it works just fine. It's a bit slow though if you plan on taking jshots in long succession, it will just overheat and stop. As far as video goes, it hadn't stopped on me yet, but I haven't really taken videos longer than 10 minutes before.
Same for this. Overheating media is a signal that the media does not meet the specs the camera needs. Overheated media has been one thing noticed when Patriot, A-Data, and Dane-Elec media fails (either stops the recording or just flat corrupts). I've followed these issues on several forums for the last two and a half years.
A card that got hot on me would go in the trash.