I had a great stay at Marcello's place. Firstly, I can completely echo what everyone else has said about Marcello himself. He is a great host. Excellent communication and will do anything to help you out. You couldn't ask for more.
The major advantage to the studio is the location. Literally turn the corner and you're in the centre of it all. As a female travelling alone it is important for me to feel safe and I did at Marcello's place.
The bed is super comfy and I slept really well. I'd have no hesitations staying there again.