The best apartment I've stayed in so far, in the world. You can tell it used to be somebody's home, as there is everything you need and some. Clean linen, soft towels, premium beds and pillows, super-equipped kitchen (toaster, grill, loads of tupperware, knives that cut, juicer...) and a dry place to hang the laundry. Shower is great too, with two knobs instead of the plastic shower head you get in cheaper places that doesn't have actual hot water.
Location is central, just a few mins from metro station Botafogo, close to a few high-end supermarkets - zona Sul is my favourite, pricey but worth it. The price is very reasonable too. Can highly recommended it.