Mach Speed Trio 4GB MP3 and MP4 Video Player (Black) Best Quality

Been using this for about 2 months. Use it for both music and video.
For music - battery life is great at 6-8 hours. Sound quality is good (though I am not an audiophile) , and you can select from a half a dozen equalizer options including creating your own. (Sound quality is mainly dependent on earbud quality.)
For video - screen size is large enough to enjoy movies or TV. The battery life is about 2 hours with video. When the battery gets too low, it shuts off the player without warning. That is annoying.
Has a built speaker - not very good, but most people will never use it very much, so speaker quality is a non issue for me.
Player takes micro SD cards. I have used 2GB and 8GB cards without a problem. I suggest you get an 8GB card. The cost is minimal and increases the memory tremendously. When attached to your computer, the player and the SD card look like hard drives and you can add/delete files to the player and SD card directly. On the player, the SD card files are listed separately from the files on the internal drive, so you do have to find you music/video files on the SD card (Not a big deal).
I covered my screen with a screen protector as there are no cases around that will fit this player. The back side is shiny (chromed) metal and can also get scratched (I don't care).
Have not used other features much - Radio, Ebook, Stopwatch, Photo.
The Trio V430 is a great value. May get a 2nd one for my wife.Get more detail about Mach Speed Trio 4GB MP3 and MP4 Video Player (Black).