I have stayed there for 2 weeks, while doing studies in Madrid.
Good things:
1) location is perfect. Close to metro. The street is not the busiest, while parties are all around. Apartment is in the inner patio, so no noice at all.
2) interior is great. Good quality furniture, bedding, linens, bathroom.
3) kitchen is well equipped.
4) there is a dining table.
Things to be aware of:
1) some pics are misleading, for example, there is no nespresso coffee machine and sound bar in the apartment. When contacted owner, they advised to use mocca coffe maker, but this is not what you expect.
2) as many other reviews mention, the apartment is quite dark.
3) if you plan to work from there, be aware, that chair and table are not great for long hours with laptop.
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