We had a room for three people (although we were only two travelling- it was what was left available by the time we booked), and really enjoyed how spacious our room was. It was really clean, comfortable beds, quiet, and very good bathroom (powerful shower). We had a fridge for cold drinks.
Air con was fine. Not the most efficient, and you couldn't seem to set it lower than 18 degrees (which seemed to be common in Italy, so is perhaps an environmental measure), but cool enough that we were comfortable.
Location is excellent. Really convenient and great neighbourhood to explore - plenty of options on your doorstep without it being noisy.
Breakfast was served at a bar across the square. You got one savoury item (eg ham and cheese bun / salami bun) and one sweet item (eg croissant / doughnut - try the pistachio doughnut - so good!), plus orange juice or a coffee. The breakfast was nice for a couple of days, but to be honest the limited pastry-heavy options (no fruit, no yoghurt, no eggs etc) did quickly get boring.
Staff were super helpful and responsive via WhatsApp (although it wasn't easy to find where their office was on check out to store our luggage - could do with better signage).
Please note that the accommodation is upstairs, and there's no lift, so if you have heavy luggage or mobility issues, this wouldn't be the right choice.
Overall, would recommend and would stay again, but would make alternative breakfast plans after the first day or two.