Location was awesome and checking in and out was easy too. The apartment also feels safe since you need to go through 3 doors to get in. If you stay 4 nights or longer, I would recommend you to bring an extra bath towel since they only supplied 2 for my wife and I. The only complaint I had was regarding the cleanliness of the floor. Walking barefoot will cause to have dirty feet in no time.
The kitchen is well supplied and we were able to make breakfast every day. There are groceries very close by and bakery too.
The apartment is quiet since you can’t hear outside noises. But sometimes you can hear the person taking in the unit next door. Perhaps we were lucky that our neighbors observed the 9pm noise curfew.
I would book and highly recommend this place again in a future trip to Madrid.