Summary: My wife has an iPod nano, and while the sound is good, the iPod has had a reputation for breaking and I found the iTunes store a nightmare to navigate. For me, it came down to the Sony or the SanDisk. While the SanDisk is less expensive and has the microSD slot, it is almost as fragile as glass. When I looked at them at the local BestBuy, the SanDisk on display was broken after 2 DAYS on display.
Pros: Easy to use. Works without having to load drivers or proprietary software. Best sound quality I've had from any MP3 player. Great headphones. Long battery life. Lots of sound enhancement options.
Cons: Too short headphone cord (and while there is a reason for it, I think it sucks).
Summary: I've tried several different MP3 players, and this is the best one I've owned. The included headphones are also excellent. The A818 is simple to use, and well designed. The "Media Manager Software" that is included is OK, but it is much better if you spend the few dollars and register it. You can just drag and drop your files on the Walkman, and you're ready to go. Battery life is excellent. Screen resolution is very good, but small.
Excerpt: I always wanted a MP3 player but managed to control the urge to buy for many years. However, when I went to London to work, the urge to get a MP3 player became stronger due to my constant commuting using the underground train. The train trip was too noisy for me to be able to read my books. In the end, I went to one of the shops near Tottenham Court Road and bought this Sony MP3 player for GBP 99.