Excerpt: I used my Canon 5D everyday and have been using one SanDisk Extreme Pro CompactFlash memory card for over 2 years. Not a good idea, but the card has never given me a problem. For the wear and tear, daily use (and shooting in RAW)- I'd say this product is very relaible.
Excerpt: I use this CF card in my Canon 7D Mark II, because I know at 10 fps, I can overwhelm a lesser speed card. I have had slower cards bog down, just after a dozen action frames, keeping me from taking shots at the best part of a surfers' ride.
Excerpt: My old Sandisk card was, well, old. A bit slower, and the red read light on my camera kept flashing as if the card wasn't reading as quickly as it should. This one is working great on my 7d, in fact I bought two.