HardwareZone had a look at the 3G W900i Walkman music phone from Sony Ericsson, here's a short snip from their full test report:

Like its two predecessors, the Sony Ericsson W900i seeks to leverage, again the Walkman appeal to woo consumers. That means the same pleasant Walkman media interface has also been brought over to the W900i. Though there are no significant changes made, the overall response of the entire phone and the Walkman interface just did not feel nearly as sharp or instant as the W800i and W550i counterparts. Frequent intermittent stutters were experienced when going through the menu subsystem of the phone and was most noticeable when the Walkman interface was running in the background. Other than this niggling software disorder, the W900i was just as easy a mobile phone to live with as its 2.5G siblings..



Link: HArdware Zone