I am just talking about my personal opinions on operation.

smoothly or not：

The handbook recommend 640×480 videos, and I do not have much too videos on my computer, so I tried a 760×416 resolution video, which plays perfectly. When I move the slider to fast forward the video, in surprise there is no delay.

clear or not:

Because of DS screen resolution limitation, the playing effect is very similar with DPG, not bad. But the subtitle is the problem, when you watch a video on your PC, the subtitle is clear, but the same video on DS, it is hard to see, I am expecting the external subtitle.

Where to buy it ?

Please visit the URL: http://www.hopebuy.com/0001/0403/21925001.shtml