OK, so my brand new C00 7 Pro showed up today! My main cabinet is a fEARful 15/6/1, and for a while now my only amp has been a Streamliner 900.
It looks good, controls feel solid, and layout seems intuitive. Power LED took a few seconds to come on, which gave me a minor coronary.

I've been playing through it and A/B'ing against the Streamliner for an hour or so. So far I've only tried it with the fEARful and my main bass, which is a Nordstrand NJ5 with Big Singles and the Nordstrand 3-band preamp.
Gain Structure
The gain structuring took a bit of getting used to. When I hit hard, I got a bit of crunchy fuzzy distortion (and not in a good way). This was regardless of the gain setting. In order to get headroom, I had to hit the -15dB switch, and then I could crank the gain up to about 2:00 and get a good strong clean signal. OK, just a quirk of the amp. I can deal with that.
Basic Sound
The tone with all controls at noon is good, MUCH more neutral than the Streamliner (but what isn't?

). I messed around with the amp set "flat" for a while. I could gig with that sound, no problem. It has a good classic sound. Nowhere near as "tubey" as the SL. The low end does not have the thickness of the SL, but that could be a plus in a mix I guess. It's not as clean and pristine sounding as the SL, which again could be a good thing in a mix. The Streamliner has a rounded low-frequency attack on each note that I've not heard in other amps, it makes the notes pop out even with the tone rolled off. The 7 Pro has a more conventional sound to the note attack. I like the sound of the compressor, although cranking it reduces my gain a lot. I will probably leave it all the way down or at most at 9:00. When it is cranked up it gives a bit of that Billy Sheehan tone, which might be nice sometimes.
Volume
I know about differing curves on the volume knobs, but it does not
seem nearly as loud as the Streamliner for a completely clean sound. Once I maxxed out my clean headroom on the preamp, I was able to turn up the master to noon, and although it was loud, it was easily bearable. The Streamliner on the other hand starts to get frighteningly loud by around 10:00, unbearable and dangerous at noon. I don't want to crank the volume in my practice room, so I don't know what happens beyond that setting on either one. I'm guessing it will be loud enough even through my 8 ohm 15/6, but I like to have lots of clean headroom. I'll report back after a rehearsal or gig.
Tone controls
Ultra Lo scoops the life out of the tone for me, so I probably will never use it. Ultra Hi makes the sound very lively, so that may be useful. Bass and treble controls work as expected. The bass boost/cut seems wider than the Streamliner, and even boosted the low end does not seem as solid and thick as the Streamliner. I'm assuming this has to do with mid-humps and such. I think I would tend to leave the 7 Pro bass control flat most of the time.
Here's something I find a bit wierd and worrisome. The taper on the mid control seems to be all squashed into the extremes. No matter which frequency I choose, there seems to be a big change between 7:00 and 8:00, very little change between 8:00 and 4:00, and lots of change between 4:00 and 5:00. When I sweep the control it almost sounds like there are two switches at the ends of the travel, if that makes sense. Is this normal for the 7 Pro??? It doesn't give much control over the mids, which are the most important frequencies.
Overall
It sounds good, and has a more "normal" tone than the Streamliner. So far, it's not blowing me away, but I've been playing long enough to know that the sound only matters in the mix, and I won't be able to judge that in my practice room. I'll be taking it to The Good Hurt for a gig tomorrow (with the Streamliner along as insurance of course). I'm not the type who goes gaga over amps immediately, so I'm waiting to see how I like it in the band context.
If I have the energy I might try out the Uber 410 and the NeoX 212 cabinets to see how that changes my impressions.
If anybody has any helpful input on the mid control taper, I would appreciate hearing it.
More as I learn the amp.