The location is fantastic. We didn't think it was very loud. Some mild street noise, but nothing too overwhelming. The air conditioner worked well, the bed was comfortable, and the shower had plenty of hot water. The bath towels were really small and the hair dryer was a tiny travel size, this would be an easy fix for the hosts...girls with long thick hair would appreciate a full size towel with a full size hair dryer...kind of silly to skimp on these things.
I did email the hosts the day before asking about more info on luggage storage since I had no idea if the places they listed were train stations or stores...they did not respond. It was 20 Euros to store two travel backpacks for the day across the street at Espaca Chiado. And for your info, Espaca Chiado is a small mini mall across the street and the baggage storage is on level SS and call ahead to make sure the store is open (they will come open for you if they know you are coming). This took me awhile to figure out and had to do several google searches and a phone call to get this info.
I did text twice Marco on the day of check in with no response and it did seem as if possibly my texts did not go through (all other texts to my other hosts in Portugal did go through), but going to give him the benefit of the doubt that he didn't receive my texts. He did answer my calls and seemed somewhat perturbed that I was bothering him asking about when he could meet us for check in. He indicated that he had to go to airport and could meet us at 7:15pm so we managed our day to meet him at that time...and again in person he seemed terse and bothered that we were interrupting his day. We took about five minutes of his time to walk us in and show us the place. Easily the least welcoming host we have ever experienced in our home rentals.
To sum it up, great location, but would probably look for another place to stay in the same area that allowed luggage storage in the apartment and more responsive welcoming hosts...this is the ONLY place we stayed during our weeks in Spain and Portugal that did not allow baggage storage in the apartment after the other guests checked out.