This place was GREAT!
My wife and I stayed for two nights in one of the 2 bedrooms and had our own bathroom just outside our room. At the time there was another guest using the other bedroom (which has it's own bathroom) but there were no privacy issues at all, and in fact the other guest happened to be a Chef, he was so nice he even cooked for us!
Everything was clean. Our bedroom had 2 twin beds, with plenty of Bedding in case you feel cold. There's also a kitchen, with fridge, microwave, and everything you need for cooking, and a living room with a TV, and ofcourse Internet :)
Luis is super nice and friendly, he's actually a Violinist and a damn good one!
He was very helpful with tips and suggestions for food nearby. The apartment has a great location, it's on the Coyoacan neighborhood which is so cool (Frida Kahlo's house is nearby) and there's a subway station a couple of blocks away to go everywhere else.
I highly recommend this place.