Icewalker
No question, it is really as fast as it's rated. How fast? Well, class &#34;10 SDHC&#34; means literally SD format, HC=High Capacity, Class 10 = 10MB/sec read-write. How fast is 10MB per second? Well, Class 4, the most common step down (i.e. cheaper) is Class 4, i.e. 4MB/sec. So Class 10 is 2.5 times faster. Why pay the difference?Digital cameras: at some point the number of pictures/sec or HD video is bottle-necked by the speed of the media it is being recorded to.Smart phones? I have a Samsung Note II. A Quad-core processor, wiz-bang yadda-yadda. Yes, I DO notice speed differences in camera, app performance (I use a spreadsheet app/browser/NetFlix/Music streaming, et al) is noticeably FASTER. Where do you think the phone stores stuff to when it doesn't use the factory installed memory? (iPhomes don't have an SD slot, and I wouldn't own a phone or tablet that doesn't -- I believe in choice in the computer realm)Oh yeah, SanDisk is a leader and pioneer in the SD format (where do you think the 'SD' came from?). The only other SDHC Class 10 card worthy of comparison is the Samsung brand, but then I might be biased on that one.