I bought this to go along with a Canon PowerShot SD850. Even with the camera set to take the highest quality pictures (3264 × 2448, around 3mb each) this card will hold over 1100 images!! I doubt I'll ever fill the card, especially since I try to download once a week or shortly after pictures are taken, but still...1100 pictures! It's almost ridiculous.
The card itself seems very fast and has been reliable so far. If anything changes, I'll update this review. I think it's worth the few extra dollars to have all the additional storage capacity.