Very few 16gb MP3's available - unless you go down the Apple route or get an 8gb with expandable memory, so, having already own a Sony, decided on this.
Easy to use and load. Comes with pre-installed instructions and other software, but I used my Windows Media Player and drag and drop. Although 16gb, only about 14gb for music. Radio feature very good, clear and great tone through the supplied headphones - better and more comfortable than my Sennheiser CX300. The Sony's sit more naturally in the ears without having to constantly turn them to try and get the best sound.
Various sound options, including effects and graphic eq - very similar to my old 8gb walkman - but with more storage! Sony do a touchscreen 16gb walkman, but it's twice the price - this one gives plenty of storage, is small and a great sound. I'm only using it for music, although the photo and video function is there, as well as a host of other things - karaoke, if that rocks yer boat!