Helvecia Apart is a nice hotel to stay, it is located in a very convenient place in Las Condes and in general has everything you need to make your stay a pleasant one. Staff in general is helpful, but unfortunately they are not always available, the whole experience is managed on the informal side.
I read about the breakfast not being on site, which was ok for me, but there was a 2nd inconvenient with it, and the problem is that the place only serves breakfast from 9am-11am or even later during the weekends, which basically makes it impossible to grab or find a place to grab a quick bite if you need to leave early.
The installations are slightly old, but extremely clean. I would totally come back and recommend others to stay here if they are planning to move around the area.