Well, since I upgraded to the new canon 5d MK IV, I realize I needed bigger and faster cards and specially for video recording. The cards son far feel great. It handles files quickly and can review my shots quicker. I like shooting fast for my lifestyle photos and this CF cards deliver as advertise. They also work great with my medium format camera. I can now shoot a bit faster with out being delay or getting and error on the digital back on my cf card. I would be buying more cards.

If you are new Photography this may help, many cameras will take an SD card or CF(compact flash) card, the latter writes faster, and stores more information, shooting in Raw format allows you to edit your photos in programs like Photo Shop and get professional results, I used to go for the 64mb cards but after I learned it is recommended to reformat the card every time it is removed there is no reason to have that much storage, I now carry (1) 15mb & (1) 32mb card, these have not let me down

Purchased the SanDisk Extreme Pro CF card (32GB size) about six weeks ago and have used it almost daily in a Nikon D4S without any issues. Fast writing speeds and no technical problems to report. When uploading to laptops and desktops using a USB 3-type card reader and cable the typical upload speeds have been between 120-128 MB/S. Recommend buying if found at reasonable price.

I'm using this card in my Canon EOS 7D Mark 2, and in my EOS 7D, and this card is fast enough to handle the fast burst rates that these cameras shoot (and I shoot both Large RAW and Large JPG simultaneously so fast storage is critical to me). These cards have never failed on me (I have a number of the SanDisk Extreme CF cards) and I've been using them for years. I HIGHLY recommend them.

I purchased this specific compact flash brand/model/speed/size combination per professional review, to pair with SD card with same matching specs in my Canon 7D. Performs without flaw for relatively long bursts up to 10 frames per second, even when shots are being recorded to both cards simultaneously (CF/RAW + SD/ Lg JPG). Apologies, cannot provide assessment of performance with video, as I only used the 7D for still photography.

Recently purchased A used Canon EOS 7D and wanted a Compact Flash Card that could be written to very quickly to lessen Buffer choke when in continous shooting mode (up to 8 shots per sec.) card has more then met The Canon Specifications

Lexar is well known among professional photographers. The Professional 1066x card is their latest CompactFlash offering. The card touts read speeds up to 160MB/s using the latest UDMA-7 protocol and a guaranteed continuous write speed of 65MB/s for video applications. It is available in a wide range of storage capacities: 16, 32, 64, 128 and 256GB.

i had to buy a cf and see these are more expensive than sd cards ,, but then again these are faster read write though .. using it for over a month and not a problem with this and all my mem cards are all sandisk ,,, a tip for reading my review ,, get them on sale ..