Summary: To the person with multiple 1 egg reviews saying this card does not work in a Canon SD630: that camera only accepts older SD cards and not the newer SDHC cards (like this one). If you would hav consulted your manual or the Canon website your issues would not have occured.
Pros: Works as expected in multiple devices. No problems reading and writing to/from this card.
Summary: For the reviewers giving this one egg: SD and SDHC cards are completely different other than the physical card shape. I don't care what your hardware says it will take, unless it specifically says it will accept SDHC cards it will NOT. Taking all SD cards is different than saying SDHC.
Pros: Works great when you have the right hardware. Fast transfer rates (Class 4 product).
Summary: Computer doesn't see it. Digital picture frame that says it's compatible with ALL flash memory cards doesn't see it. Was installed in a Canon A640 and it stores photos on the card and they can be reviewed using the camera but the card can not be read outside of the camera.
Pros: Can't really be any pros if it doesn't function as advertised, although it seemed quite reasonably priced for a brand name product.
Cons: Hmmm.......let me think..... IT DOESN'T WORK!!!
Pros: I bought two of these for my new Nikon D40X camera. Cards work well and have a ton of capacity. HP makes quality products and this is no exception.
Cons: My only frustration is that the cards are not read by my Sony 17-in-1 External USB Memory Card Reader (MRW62ES1181), even though I was assured by Sony before I bought the card that the reader is compatible with SDHC cards.