Got one today. The screen is nice. Controls are confusing a bit as its function changes depending on menu position. For example, if you need to select file from list then use Up and Down buttons to . But if you need to select an option from list, then you should use + and - buttons instead. And button function is changing in every game, so no pattern here.
The user guide is a joke. For example, there is a list of player's strong points. One of them is "solid timber". Huh?

(I know, my English isn't much better, but then I am not writing user guides for MP3 players

).
This player comes without any games installed. Don't bother to download it from the address stated in user guide (unless you know Chinese, of course). All the games are here:
http://www.mympxplayer.org/sample-games-dc41.html
Download, unpack, then create directory "Games" in player's main memory and copy all *.rkp files in there.
Video must be converted to Xvid (in AVI) 320x240 @ 20fps. There is mini-CD in the box with Win98 drivers and AVI convertor.
The player tales 2GB microSD cards but doesn't support SDHC. Memories are not unified (Creative Zen style, rather than Sansa), so if you have some MP3s in main memory and some on flash card, you'll need to switch manually between them.