Marco is a great host and lovely to deal with. He left us face masks, hand sanitizer and a bottle of red wine for arrival! He sorted us out with a smoke detector when I asked - even though the description made it clear the apartment didn't come with one. I offered to pay but he said no problem and didn't charge (he viewed it as an investment).
He is a really nice guy, trying to build his business the good old fashioned way - by been good to his guests. The location is as optimal as you can get if you want to see all the major sites (the furthest walk is 40min to the Vatican, Colosseum 5 mins). The street itself is pretty quiet - I am a light sleeper so I was thankful for this. The apartment is great for two adults and depending on your age fine for 4 (we had our two kids so it was fine for us). The set up is simple but chic, there are a few minor problems that I pointed out to him (the bathroom could do with an extractor as it is cause a bit of paint to come away), but for the price I wouldn't think twice about stay there again.