Well, it's a very nice, new apartment in a high-rise close to the south gate of the city wall, where they perform a show almost every night in front of the lit-up gate. Looks spectacular. You can get to the apartment easily on foot from the Yongningmen subway station of line 2. However, it's hard to find, especially since the sign outside shows another name than what you find on Expedia and nobody speaks English. There is also no reception and you are simply on your own. This makes it hard to actually ask a question or get any help.
The apartment itself at first glance looks nice and new, but I don't think the floor has been cleaned recently. Getting into bed with naked, freshly washed feet produced dirty sheets. The shower stall has the door hinges loose and you can't adjust the position of the shower head. No opportunity to hang up your wet towel, either. There's a little kitchen with a kettle and two glasses, but bring your own coffee, tea, sugar or whatever, plus a spoon to stir. There are no tools.
The Wi-Fi was excruciatingly slow. I spent an entire day to reserve some train tickets, a task that would have taken an hour with decent Wi-Fi. So, unfortunately my stay in Xi'an turned into something of a waste and I didn't get to see what I came there to see.