Mimouille
Headphoneus Supremus
Yes let us hope they can optimize UI speed with FW. Only other issue to me is weight. In my suit pocket, my jacket is clearly leaning to one side...I'm also owning a Sony WM1Z since two weeks and I totally agree with Whitgir point of view.
In my opinion, the WM1Z is more that its only superb SQ. I also love its internal storage, its form factor, fat but not too tall, and it's very simple UI.
I only regret its quite sluggish OS in albums navigation.