I paid 500 euros for 3 nights and I was not satisfied with the value I got.
1) check-in was broken. I received the check-in email but there was no code in the email. The field where it was supposed to be was blank. When I arrived at the apartment, I didn't have an internet connection, so it took me more than an hour to contact the host to ask for the code.
2) The noise. You will clearly hear people walking upstairs and you will wake up at 8 am every morning because of the glass garbage bin under your windows. It was really hard to sleep despite me being exhausted from hiking/walking.
3) Small things: there were only 2 coffee capsules for the coffee machine, no tea, no teacups(!!). The only cups present were 100ml ones for espresso and glass ones that can't hold hot liquids.
No dishwasher + obligation to wash dishes when you leave = probably you should wash dishes when you arrive, I wouldn't trust the previous tenant to be thorough cleaning the dishes. (keep in mind 166 euros per night)
4) The apartment looks way bigger in the pictures. My bathroom in Finland is bigger than the whole apartment and you won't see the view depicted in the posting. It's blocked by the table/wall and there is only one place from which you can see it - leaning over the table. The apartment itself is quite dark, small, and weird. Also, the floor is crooked. I think it's about 5°; anything you place on the floor will start rolling with acceleration towards the bathroom :D
5) Only one trashbin. No recycling.
I want to give some credit to the cleaning lady, who was nice. I was taking out the garbage when leaving and she picked it up from me. It was a pleasant encounter.
Even though the location is great (~10 minutes to the central railway station), the apartment was overpriced. I had another option that was cheaper (roughly the same distance to Zurich HB) but I really liked the view from the window in this one, which appeared to be a lie since you can't really see the view.
And, considering all the abovementioned points, HITRENTAL should reduce the pricing and put a little more effort into the check-in process and amenities such as cups (!) and tea/coffee. The price/value ratio was definitely unfair.