All in all, I'd say it was a worthwhile stay.
The biggest negative I can give is that, depending on the room you're in, they can be quite dark even in the middle of the day. Especially if it's not street facing, like ours was, you'll have this matte plastic over the window (I suppose that it's for privacy?) that dims the natural light quite a lot. And seeing as it was the only source of external light, and that it was in one corner of the apartment, the opposite corner basically required artificial lighting at all times. While it's not necessarily a deal breaker, it's worth knowing beforehand.
Other than that, every was pretty much in order. The staff is super friendly and helpful. You can also message them on WhatsApp for whatever you need. The wifi/chromecast combo for the TV can be a bit finicky at times, but with some patience it will work. The place was clean, the kitchen was equipped with all that you need.
I can't stress enough how well placed it is, however. You're a couple of minutes from the dead center of the city, and it's really easy to get anywhere you need.
In conclusion: definitely worth a stay, if the issues mentioned above are not deal-breakers for you.