So, I've had this a while now and I'm officially impressed. I'm used to spending a fortune on SanDisk's Extreme Class 10's but this was too good a price to pass up. Stuck it in my Canon dSLR the day it got here and used it almost every day since, it hasn't missed a beat. I don't do a lot of speed shooting photography anyway but I've never hit the buffer on it so it's clearly fast enough but this can depend on your camera as they all have differing buffer sizes. Speed definitely helps though and this delivers. On top of that, it looks the part, yes it may well spend all its time hidden away in whatever device you choose to put it in but you'll grin on the inside every time you pull it back out (could just me though but then I'm a bit like that anyway!!).