I now have 3 bObs.  All are named bOb.  Each has an area to clean, so no crisscrossing.  I don't know if each one only connects to it's base, but being in separate areas it won't be a problem.  Wood floors are prone to 'sanding' if the grit isn't picked up regularly.  I set these up myself, no help, and it took about 5 minutes from box to charging.
I love my bObs!