Summary: First card I recieved failed the same day in my D300. The replacement failed the second day I had it, at the start of a big photo shoot. Thankfully it failed after I had only shot 10 images so I went to backup cards. It's being returned and I don't think I'll risk my shots on a third one. In contrast I purchased a Kingston 16Gb 233x at the same time which has worked flawlessly.
Summary: I have a Nikon D300. I thought this memory would be a good deal because its price, but expect a cheap performance accordingly. It is super slow and not reliable at all for action photos. You may use it to capture flowers on a tripod, but DON'T rely on it for unique moments because you will lost some special shots, as it happened to me; when I needed the card to be ready, it was trying to be ready, then I lost important photos.