We spent two months renting Gilad's apartment, and highly recommend it. Great light, and spacious by Madrid standards. We love the neighborhood Malasaña as it is lively but not terribly overrun by tourists. Gilad was very accommodating, including letting us arrive a day early when we mentioned our plans had changed and fixing the AC when we said it was a bit noisy when we were sleeping. (It works perfectly now). We'd stay again if the dates work out!
Unexpected plus - the apartment is at a corner where a street deadends into it, and so sitting on the small balcony you get to look down an entire street instead of just a building opposite it. Really opens it up!
Unexpected but ok if you know - The oven is a microwave/convection oven, so doesn't work like a regular oven (i.e., you don't have a temperature control if your recipe says for you to set it on a certain number of degrees). Also, the pictures make it look like there's a lot of storage space but about half of it is full already - it's a fine amount of space but am mentioning it to manage expectations!