It is developed, maybe not as much as Europe, but definitely not as underdeveloped as India. It has streetwalks, huge flat buildings, a quite ordered traffic (though I didn't arrive during the rush hour) and with quite common cars, fancy girls and fancily dressed. I had been warned though that I was going to one of the wealthiest areas of Santiago, so more to find out in the upcoming days.
The guesthouse where I am staying for these first days is indeed very nice, but with a peculiar concept. More on this shortly...