Tania's place was perfect for our short trip to Zürich, and would be equally good for business or leisure. It's actually a relocation apartment so it's set up with everything you'd need and nothing more; think hotel vs staying at a friend's place. It's in a great location by the lake and has plenty of transport, not that you'll need it because everything you need is walking distance. There are lockers at the train station at the end of the street if your arrival/departure time is off.