I have this card and find it excellent for still photos and for HD video (even though the camera is supposed to have a class 6 card for video). However, it is clear from some of the comments that camera and other equipment manufacturers should make it clearer whether the product takes SDHC as well as the older SD. In the manual for my wife's camera this is stated but is not prominent.
To my main point; whatever type of card their camera takes, do users realise that they should format the card in-camera? This ensures best performance and a lesser likelihood of problems with any make of card. Formatting in this way can be used to empty the card after all files/pictures have been downloaded to a computer. Even if you delete your files/pictures using the camera it is as well to re-format the card in-camera periodically as well as before using it for the first time. NB files cannot be retrieved after formatting.