I have used this product for about 3 months now and am very satisfied with it. The sound quality is very good and the well designed interface (similar to iphone) is very ease to learn to use. The only thing I do not like about is the 64 Gig capacity is not big enough for my entire collection. Hopefully next generation will increase capacity to 128 Gig. I am using the unit currently with Itunes 9.03 and Win 7 64 bit and everything works fine.
Tamron AF 28 80mm