Summary: I bought one of these to use on a Canon 5D mkII. I've had no problems and will continue to use Kingston memory cards for critical applications.
Summary: Bought this to increase the number of shots I could get, and it's perfect. Fast read and write speeds, and double the number of shots I can save.
Summary: I am satisfied with fit and function. The processing time is sufficient to allow RAW photos to be taken in rapid succession. Camera: Canon Rebel xTi.
Summary: These are used on an embedded system running a custom application. They get formatted to a non DOS environment so they are readable by Windows and Linux.
Summary: I bought two of these Kingston 4GB 266x compact flash cards for my Nikon D200 DSLR when they were on sell for $18. WOW, what a good buy on a super fast memory card!