Excerpt: I wish I knew the importance of a "Class 10" card (speed) before I bought my last 3 memory cards. I replaced the "Class 4" in my Smartphone with this one and I no longer notice the delay between snaps when I take pictures.
Excerpt: I bought this card for a Sanyo Xacti recorder. It works great for the MP3 recordings, however the recorder says it is too slow for recording in WAV format. I have yet to find out if this is due to the card or the recorder.If needed I can always use it in my D300s.
Summary: The cards arrived fairly quick via USPS mail. They are what you would expect in an SD card. I needed one for a digital picture frame, this was the ticket. With the adapters included with the cards you can use them in cell phones and other devices that use the larger cards. All in all good purchase.