Genryu
I am primarily using this to supplement storage on my Microsoft Surface Pro and have a small library of movies and TV shows to carry around while I'm on the go. A lot of ultrabooks and the like come with just 128gb of storage and I think this SD card is a great way to store some media while you save room on the hard-drive for your program installations etc. The speeds I'm seeing are consistently around the peak that the card is rated for, and work great for playback of my lossless MKV movie files recorded at a high blu-ray quality bitrate. I've also tried it with my Android smartphone and I'm seeing similarly high peak-performance speeds for file transfer and smooth playback of media. It comes with an adapter to convert it to the standard SD card size in use with devices like SLR cameras etc. so you'll be covered under almost any circumstance. I only wish I could buy a larger capacity model, but as it stands I think with the Amazon sale prices that regularly come for this product it's a great deal.