I really enjoyed my 2-week stay at Miguel's apartment. It was a little bit more than my typical budget, but I definitely got my money's worth -- located along a beautiful leafy street in Condesa, the apartment was in a primarily residential area very close to parks with plenty of cafes, bars, and restaurants nearby. Neighborhood felt extremely safe, day or night, with local residents always about, walking their dogs or just out for a stroll.
Apartment itself was very nice. It felt very modern with lots of natural light and more than enough room for just one person (I would say the apartment could comfortably accommodate two couples, with two bedrooms and two full baths). The building felt very secure with a 24-hour doorman on duty.
Having stayed in 3 apartments in Mexico City over two months, I will say Miguel's apartment also had the best (and hottest) hot water I experienced (it was a little tricky at first -- basically, when I wanted to take a shower I had to reach over and get the hot water running in the bathroom sink before it would flow in the shower, but it only took a minute or two and when it got to the shower, it worked great!). The hot water alone was worth the extra cost.