My parents-in-law had a very nice two-week stay in a CityStay apartment on Forchstrasse. The apartment was clean, comfortable, and well-appointed, with access to shared laundry machines. Our requests (for a hairdryer and to fix a leak) were quickly addressed by the concierge, who was easy to reach by email. Check-in and check-out were also very easy, and the location -- next to the Hedwigsteig tram stop -- makes travel into the city simple. I highly recommend CityStay's Forchstrasse apartments for business travelers or for people visiting friends and family in the neighborhood.