When I bought the X-pro1, it came with a Sandisk 8Gb card. But it was of a rather sluggish variety. It took time for the camera to write if I was taking RAW snaps. Annoying.
Time to get a proper card. So, I plumped some good money for a better 16Gb number. It worked really well on the test so far. Let's see how it hold up the next time I go about town taking snaps.