I always get a kick out of the disclaimers for stuff like this. It's absurd that anyone has to even mention "I know it's not a real DB, but...", but there are the ever-present pedants on here that just have to assure us noobs that a BBB or washtub or gas-can etc. isn't going to get us to DB nerve, Anna. No ship sherlock.
URB player: "Hey gang, I'd like to take up the slab, but I've never played one before. I heard the Ashbury is a great crossover instrument cause it's meant to sound kinda like my upright, but it's a guitar, but without frets. Anyone tried one?"
ON to the BoX...
The main problem with the BBB is that it's too small. I don't care about how many strings it has. What you need is VOLUME, as in interior SPACE!
After a hard day's busking with it on the cusp of gentrification, a feller wants a box big enough to retire in for the evening, yet light enough to drag it back within the comfortable depths of skid row, to a quiet alley where you can relax and stretch out, brew a cuppa over a tuna-can tea-candle etc.
Heck, the BBB doesn't have enough elbow room to crumble up the day's cigarette butts and roll a stoagie with the page ripped from that Good Samaritans' bible.
In the BBB's corner, it does have those lurvely squiggly windows to let some light in. Mind, might get a wee draughty in the winter. Clear plastic bag and duct tape otter take care of that...