We had an amazing time in Madrid. Melvin's apartment is ideally located with many bars, cafés and restaurants around. It is on the ground floor and it's quite bright despite having no windows. Like in most apartments in southern Europe the sound isolation is not perfect - depending on your neighbours it can get quite loud even at night (although easily fixable with earplugs). A downside is that the wifi in the apartment is extremely slow, I'd say even too slow to use (it took more than 5 minutes to load the starting page of google so I gave up and instead used the wifi in a café). I don't know if we just had bad luck or if it's always that slow. All in all this apartment is very good value for the price.