I bought this product about a week ago because it plays almost every format out there and I use Flac for my music and it plays it and also has a 16 gig sd card slot in the side of it for expansion. It took me a while to load all the music on but was very easy to do(much easier than my friends ipod). After doing so I turned it on and it immediately recognized my music and the sound quality was very good for a 2" by 1" unit, way better than the overpriced I pods that my friends have. it just seems like the op amps in this thing are of a better quality than the Ipods and I wonder why people by Ipods when these are overall better players for a little over $50 or at least thats what I payed. Very impressed with this unit as I bought it to listen to music as I ride my mountain bike or around the university. I would highly recommend this product and have already had two of my friends ditch their ipods and uninstall Itunes in favor of going this route due to sound quality alone.