I finally made it to Guitar Showcase this past week, and largely echo was 4stringmf said. My summary is this amp should be one of the top class D amps, hybrid or full SS, on everyone's list. It was the best amp at the store. The walkabout wasn't there or I missed it.
I was surprised at how responsive and touch sensitive the amp was. Kinda reminded me of playing the strat through the tube amps I had. I did contribute that to the 2x10 subway on top of a 1x15 subway cabinet. But, later when checking the speakon cabling in the back, I found only the 1x15 connected to the wd800. I'm not fond of 15" cabinets as I've found they tend to have a smaller window, volume-wise, to get the tone I like compared to 12". Not this one. It's something special. I had no problem with it in a lower volume practice setting and getting to rehearsal volume.
The parametric EQ for the mids was nice, but I'm more of a simplified knob kind of bass player. The one knob I could do without was the "Power Amp Damping" knob. I had no idea what it did, but thought it might be a power attenuator like a built-in hotplate. It clearly activated relays when switching modes on that knob. Came home and read the manual and found it to be something else, and something that I could probably do without to save a few bucks off the price.
Anyway, this is an amp that I can definitely practice, rehearse, and gig with. It's a real gem, more so than the D800s for me. Perhaps with two 1x15s. One for home and one to leave in the church, and just move the amp as part of the setup dance.