(I was planning on writing this up as part of the M&H factory tour report... but this seems like a good thread to put it.)
If "Opus 7" is what I saw in M&H's factory back in the May 10 tour, yes, I was (and still am) impressed.
The controller box is no longer attached to the piano under the keyboard or have unsightly wires that stuck out like a soar thumb. It's
WIRELESS!!!
It's 802.11b. The installation I saw, installed on an M&H BB, was remotely controlled by software that ran on a Tablet PC. The small, black, Palm Pilot sized wireless transceiver was very discreetly tucked away underneath the music rack. If it weren't for the green LED on that transceiver, I would not have noticed that there is a player system installed on that piano (not without having to crawl under the piano anyway).
The next step would be to make the user interface more web/HTML-centric and less proprietary. It seems the PianoDisc people are driving towards using more open standards and commercial off-the-shelf components -- a healthy tendency, IMHO.
I have the old PDS-128, and that wireless system really got me itching to upgrade.
(I did ask about upgrading -- the Burgetts' response was that they're still busy training technicians to install the new system... and they haven't got to my area yet.)