Absolutely excellent!
A clean, spotlessly clean, facility with a modern bathroom. Shower was plenty large enough with hot and cold running water. We never ran out of hot water, even when taking consecutive showers. Ample large and absorbent towels, and toiletries provided, refreshed each day.
Particularly appreciated was the air conditioning. Rome was baking in an intense heat wave with temperatures in the mid- to high 90s (F). The AC was so good, that we turned it down a bit.
The king size bed, with four large medium firm pillows, was very comfortable. After a day of sight seeing, we slept well.
We traveled to Rome to board a 10-day cruise from Rome to various Italian and Greek ports, returning to Rome. Many months prior to arriving in Rome, we booked the San Pietro Boutique for five nights. Diego was our contact there. All communications with him were timey and most useful.
Upon arrival, we were met my Francesca, and later Diego. Both spoke perfect English. They were also kind enough to allow us to practice Italian with them. They were attentive and accommodating to our every request.
They arranged car service to/from the airport and cruise port. Each worked flawlessly.
We chose the area where San Pietro Boutique is located due to its proximity to St Peter's Basilica. A slow, casual stroll makes for an 11 minute walk (Timed it).
Street side, and on-street, restaurants abound within mere minutes.
Much more. See our review for our second stay at SPB.