This WiFi phone works surprisingly well once you get used to the rather "clunky" web interface and figure out how to set it up.
This was trial and error for me, but all works fine with the hosted VoIP provider that I use including voicemail alerts and access via the messaging menu.
One irritation was that I couldn't find any way of backing up and restoring the configuration so I had to take screenshots of where confioguration changes were required.
I was also pleased to see that it worked on the less congested 5Ghz WiFi band. I imagine that this will be vital for ensuring good quality VoIP calls.
This phone will definitely become part of our product protfolio for offering to our clients as an alternative to VoIP DECT.