This being a Sony product and all, I was expecting a very high standard from the Walkman. It's beautifully designed and very sexy looking, but once I started to use it, I realised it wasn't up to the standard of other Sony products I've had in the past. For a start, the battery life is very poor. You can probably get 5-6 hours out of it at best. For me, this was the next step up from a Sony Minidisk player which went for weeks on one AA battery. Secondly, I also found the buttons to be very unreactive and sometimes have to press them twice or more to actually initiate a response.
A couple of other niggles include the fact that Sonicstage, the programme that comes with the player, is poorly designed and very irritating, and personally I think the volume control could be improved, as I find it to be too quiet, especially when you live in a noisy city like I do!
Finally, I find the walkman to be rather unreliable. It's rare that it malfunctions, but it has happened several times in the 4 months that I've had it. In the past it has randomly shut down, frozen and had to be reset and most annoyingly, the other day it deleted all 900+ MP3's that I had on it for no reason. I don't know if this is just mine, or other people have had the same problem, but none the less it is very very irritating!
Other than that, the Walkman is attractive, compact and the interface on it is very easy to use and navigate.