Using the device for about two weeks now. Excellent choice. I saw some complaints elsewhere about not being able to mute the device, which is in fact very simple (Power button > Mute). But the complaint about the screen lock is real: once you set it, you are stuck with it, unless you reset everything. the next significant software upgrade should include an option to (a) delete the screen lock code; or (b) re-set it to something else. Long story as to why I set it, but it's irritating to be unable to delete or adjust it. And forget telling me it's a "feature."
I am very happy with this device on almost every count.