La Concordia is a beautiful hotel that looks like an Italian Palazzo on the interior. Lovely tile work, huge luxurious bathroom, excellent bed, wonderful linens; and nice to have a balcony with chairs. The young people manning the reception downstairs were wonderful, an extremely helpful with suggestions about where to go, and the terrific young woman whose name I never caught (so sorry!) Offered to order us an Uber to get to the airport, which was a wonderful idea. Much better than taking a cab!
Can't say enough about their hospitality, and it was a lovely hotel. That said, you are a person who is sensitive to noise in the evenings, this might not be the place for you. Although we were not bothered by it, there was intermittent music, occasional yelling or cars with stereos booming by until about 1:00 a.m. each night. But it's a city, so we expected that,and we were not bothered by it. If you're used to very quiet places to sleep, this might not be the place for you.
And as far as the area goes, it was on the outskirts of the restored areas of Casco Viejo, But when we got lost in the daytime about a block and a half above the hotel, We did not have any problems. But we understand that it's best to stick to the other side of the hotel where all of the buildings are restored, and there is a heavy security presence to reassure tourists. Casco Viejo is a very secure area.