Our standard is three drops to each workstation, two to each printer location. Cable is (relatively) cheap; doing it over again isn’t.

As to using the switch port on a VoIP phone – maybe in a pinch, but I’d never design a network around that concept.

Don’t forget about analog devices – fax machines, credit card terminals, power failure jacks or whatever. It’s real easy to concentrate on the high-tech stuff and overlook them.

How about asking for a list of local customers that you can visit to inspect the work? I’ve seen jobs where the customer gave glowing recommendations, but the actual workmanship belongs in the “ugly work” thread.