I've always used the external reader, and its faster. Its just a hassle with the curve having to take out the batter to get to the card. I had the pearl prior and it was alot more convenient.
Although it takes longer to do, I just use the usb cable to transfer music and such. I'm constantly adding new things to my memory card that it would be too much of a hassel for me to use the card reader. But to each their own.
I've always used the external reader, and its faster. Its just a hassle with the curve having to take out the batter to get to the card. I had the pearl prior and it was alot more convenient.