My fiance and I had a fantastic stay in Carlos' apartment. The view from the balcony is one of the nicest I have ever seen. The apartment itself was very nice and well kept. The only downside was the odor coming from the bathroom.(which Carlos' contact Fatima did warn us about upon arrival) When we left the apartment and closed the windows, the smell from the bathroom took over the whole apartment, but opening the windows and balcony door for a little while once we returned helped solve the problem.
Besides that, everything else was great. Fatima was very helpful during our stay, sending us great recommendations for where to eat and what to see.
Overall, I would highly recommend Carlos' apartment for anyone looking for a quiet apartment with an amazing view, a short distance from all of the highlights of Lisbon.