ask about repairs if some section of the floor pops off, ask about a complete redo if serious issues with bonding. ask for the brand name of epoxy they use. ask and read the fine print if you have to call a lawyer in... check franchise with better bus bureau, ask for references.... In many commercial jobs a certain % of failure is OK - usually not OK in residential settings.
so he is not a coatings professional - just a fanchise owner???? what did he do before he got into floors?
ask for msds on products used - ask about induction time and voc levels on all products - (see if he really knows what's going on)