OK, my time to weigh in.
Bought a BH800 before Christmas. Compared to the weight of my old 4U rack, it's a dream. (I still have the old gear.) Tend to use it flat tonally and have the Duff Chorus and SpectraComp on the two TonePrint channels, albeit used sparingly. As of yet I've not found anything to replicate the input tone of my Sansamp BDDI, so at present I'm still using that for dirt.
TCE don't seem to be too interested in entering into conversational poop with end users; there's loads of open questions on their forum (there isn't even a proper forum for BH users!).
By the way of positives, it's light, loud and sounds pretty decent without the Sansamp. Interestingly, it's possible to blend the pickups from my Rick into the front and rear inputs. Negatives? Not enough dirty patches and there's been hardly any new TonePrints in the last three months. The BH800 is supposed to be their flagship bass amp, but will only accept TonePrints written specifically for it. The drive options are pretty poor/unusable for me, so the BDDI stays in my gigbag.
P