I spent a week in this studio and booked for a second time. The studio has everything you need to feel like home, including cutlery to cook, if you want. It's very easy to check-in with the self check-in, it doesn't matter if you arrive late like I did, it's a safe area with cafes and shops nearby, wi-fi very good (I worked remotely), quiet neighborhood. The D metro line passes near the studio so you can go the centre very easy. There is a laundry and a terrasse with chaise longs.
I recommend it especially if you stay longer and don't want the hotel experience, but be closer to argentinians, as Colegiales is a residential neighborhood with a more "homey" vibe than Palermo.