UPDATE: Well I'm getting great sound via analog and even better via digital outs into a DAC, and the SDHC card (32GB) works great, and internet radio works perfectly, and connection to my Mac-based server is superb.
USB hard connection is very flakey, not quite ready for prime time.
And switching from controlling the player via direct touch to the Logitech-supplied remote and then back works fine, but switching to a player on my Mac is just about hopeless (perhaps I'm doing it wrong?).
Cannot comment on hi rez files, I only use music ripped from cd to Apple Lossless or 256 bit rate.
On balance I am thrilled with this thing and already bought a second one for the bedroom, and can see my days of owning a standalone CDP being numbered.
The functionality that works well is flat out spectacular.
Art