It was a good stay. It's not far from the airport and it's about 20 mins away from Zurich HB. The Glattbrugg Train Station is about a 2-min walk so it's very convenient. This was our best option in terms of finding a budget friendly, clean, and comfortable stay - we booked the option with 2 rooms which was great for our party of 3. Communication is all virtual, look at your e-mails and heads up, there's no receptionist at the building. Don't expect staff to clean your apartment unless you're staying for more than 7 days. My only complaint was that they are stingy when it comes to replenishing consummables. They'll provide you with 1 smal bottle of body wash, shampoo, and conditioner and that's it. I asked for more since we were a group of 3 staying for 3 nights but to no avail.
Also, If you're gonna rent a car, download the parking app which will allow you to reserve a parking spot.