Stayed here during Milan's design week. Apartment is about 40 minutes by M1 (red line) to Rho Fiera. While this is a bit far there is an advantage that you actually get a seat in an-otherwise super packed subway.
Apartment is located next to the Gorla station which is a nice, quiet neighborhood, with everything you need close by. good restaurants, grocery shop, a few cafes and pastry shops etc...
the hosts were wonderful communicators, and left a book with useful information that they have compiled. it was easy to find.
The apartment is modest but the layout is very efficient and the decor happy. i highly recommend this place.