Summary: The picture of this item shows that it comes with a plastic storage case, which it does not. Had I known this, I would have ordered a different card for less money. And, of course, it was sold BY Amazon but yet there is no way to contact them about missing parts!? This may just be the last time I order with them just because apparently there is no way of contacting them about any problems you have with THEIR product.
Summary: I bought this card to replace a 4 GB PNY card for my droid X cell phone to double my phone memory for mainly MP3's and photos. All the files transfered ok though it took awhile (should of been a hint) my pictures and music menus have really slowed down compared to the 4GB PNY card. i was shocked how much slower this card is since it is also supposed to be a class 4 card. I am really disapointed so i put the 4 GB PNY card back in, i rather have the speed.
Summary: Only Class 4. Got this for $10, but for the same price after MIR in Nov 2010, I got a W!nt3c F!l3mct3 8GB Class 10. It's a ROCKET compared to this Kingston Class 4. Kingston write speed 4.5 MB/s, W!nt3c write speed 11 MB/s.
Summary: Product was so slow on processing small files that I thought my machine had locked up. The slowest flash memory I had tested previously was still over 8 times the speed of this card. I emailed Kingston regarding these values but they did not respond to the inquiry. If you will only be storing larger files, this card is reasonable for the price. If not, there are much better cards out there that are only slightly more expensive.
Pros: Size, price
Cons: Extremely slow speed on small files. Tested new card on ATTO benchmark to find out what kind of speed I could expect from this card. I was thinking the program had locked up when suddenly a write speed value showed up. 8 kB/s for files of .5k or less. And then a while later, 9 kB/s popped up for files of 1k in size. I am used to values of 350 to 500 kB/s for .5k files in better quality cards. Even bad cards give me in values in the range of 60 to 75. But 8? And then 9...