I used it during its second test sailing on the Fantasy in September. LOVED it! Super handy & convenient. I believe it's rolled out for the Dream already. Not sure about the classic ships. Haven't heard anything but then I haven't really paid a lot of attention recently either.
Several members of our party used it in October on the Fantasy and really enjoyed all the various features. It was a little hard to load and figure out at first, but by the second day, we were all using it.