D'Azeglio 16 is an amazing location, the room had everything I needed, and Suzanna and her daughter were very attentive but didn't hover. I had an excellent experience and would recommend this place to anyone.
It's hard to overstate how ideally located this place is. It is just about as close as it possibly could be to the Piazza Maggiore without actually being in the Piazza Maggiore (which, for my tastes, would be too loud -- as it is, the location is just the right distance). Being as close as it is also means it is in the heartbeat of the old city, surrounded on all sides by museums and cultural attractions, restaurants, pedestrian zones, the market, multiple bus lines, and what UNESCO has designated as the 'best preserved medieval center in Europe.' The city's tourist information center is also located in Piazza Maggiore. Put simply, wherever it is you are visiting in Bologna, chances are it's convenient from here. (FWIW, on a larger scale, the same can be said for Bologna relative to many of the other tourist destinations in Italy.)
The apartment appears to be a full-time rental (i.e., for AirBnB) and is furnished accordingly. While totally clean and comfortable, you won't confuse it for an apartment that is lived in by anyone full-time. In the interests (I presume) of sleeping more guests (and perhaps catering to younger/single clientele), the "master bed" is in fact two single beds pushed together. The living room "couches" are two more single beds with throw pillows. The kitchen consists of a sink, a mini-fridge, a microwave, and a two electric burners, all housed inside a large cabinet.
One minor bump in the road was that the washing machine was broken. But when I brought it to their attention, they had a guy working on it immediately. Unfortunately, they had to order a part, so Suzanna took my laundry home and washed it for me! She explained later "It's no problem -- I'm a mother of three children." The washing machine was fixed within 36 hours I think, but she (and her daughter Benedetta) really went out of her way to see that I wasn't inconvenienced by the temporary malfunction. Also, she left me a bottle of delicious, homemade wine! I definitely hope to go back and would recommend the place to anyone, including groups.