Fantastic! We have nothing but brilliant things to say about Gastón's apartment. We stayed for one month during Christmas and New Year, and it was the perfect, relaxing getaway. Everything about it made it comfortable. We particularly loved the huge patio and the BBQ grill (which we used a few times). The apartment is fully equipped and located in a quiet, safe area and is just a 7-minute walk from Ecuador metro station, which made travelling around Santiago very easy.
Gastón is a great host with excellent communication: from time to time, he checked in with us to see if there was anything we needed and was incredibly helpful and friendly!
You should book this apartment for your stay in Santiago - you won't regret it! If/when we return, we will be doing the same!