I thought I would give a brief review of my X1 I just received yesterday. First off, it's solid and well built. everyone here that owns one knows what they come with. I found the UI easy and kind of similar to my sansa. I was able to use WMP to sync my music onto the card which I was happy about. I was also very happy that it keeps the songs with the album. my sansa always went off the contributing artist, so if WMP list more than one artist, the sansa would separate it from the album. I've only put 40 gigs of music on my 128 gig card so far (will finish that this evening). I enjoy the different themes available, the eq, and the overall easy of use. Currently, I'm using the same $10 phillips iem's I used with my sansa, but the sound is like night and day. The X1 sound is clean and I have bass now. New iem's is on my list to get. Formatting the card was simple and I am using windows 8, and the card is read as X1 and I didn't have any issues with windows recognizing the X1 like some have reported. I'm only using MP3's (mostly 320, but some 128, 192, and 256). To me, my MP3 's sound better on the X1 than my sansa. I'll most likely start getting some higher quality stuff in the future. This my initial thoughts on the X1. I really like it so far and once I update my iem's, I'll probably like it even more.