We stayed for one week in this very pleasant appartment.
The appartment is beautifully furnished, very comfortable and very convivial. What is also very nice is that it is all very complete: there is a washing machine with detergents (so you can use it right away) and the kitchen is very well equipped (there are more than enough pots, plates, crockery, glasses etc.). It looks like it's only just been renovated because it is impeccable, extremely clean and well maintained. It has two bathrooms and two toilets which can be handy if you are with a large group.
The balcony is fantastic: very spacious and on the north side, so even when it is very hot you can still sit there nicely in the shade. Also you have a nice view on the street from the balcony.
The area around the appartment is vibrant and lively: lots of nice restaurants, bars and shops, and the pleasant Plaza de Chueca to have coffee, drinks in the afternoon, evening or night, or to have a meal. A big supermarket and a market are only a few minutes walk away, and also a metro station is within a few minutes walk. The market (Mercado de San Anton) is not only convenient for shopping and the supermarket, but it is also a good place for drinks with tapas, or to have a meal at the roof terrace.
The appartment is clearly also very safe: the door to the appartment has excellent locks. There is lift too so even if you have difficulty walking or using the stairs you can still use this appartment.
All in all, an excellent appartment - one of the nicests we've ever been in.
There are a few caveats though: if you want a peaceful location then this appartment may perhaps not suit you. It is a very lively neighbourhood and that means that especially in the weekend the streets can be noisy. It didn't bother us at all but it could be different for other people.
In this neighbourhood there are a lot of gay bars and that is clearly visible on the streets and square nearby. If you are offended or bothered by men kissing each other or holding hands, then this appartment will not suit you either.