I have used many makes of SD cards over the years, with some of the smaller resolution Cameras you can get away with bog standard cards, but if you use high res, 10MP or above then really you should be looking at something like the PNY pro series. The speed of the PNY has been great in my Canon D600 at 18MP, no glitches and fast record even when using RAW + JPG which records between 24MB and 32MB per image. With the pro card I can manage to sustain good multishot rates without having to wait for the card to catch-up. I have found this personnally faster than my previous Kingston pro and Sandisk pro. Worth the spend if you need the speed at high resolution.