I stayed at the Piazza Borsa for 5 nights in May. The location, in the historic center, is wonderful: just about at the intersection of two of Palermo's main streets, Via Roma and Via Vittorio Emanuele Corso. You can walk to most of Palermo's sites from there.
My room, 409, was tastefully furnished and large as was the bathroom. Initially, the room had an AC problem; it was unbelievably cold and so it was turned off my first night. Management fixed the problem and there was no further issue.
Breakfast was the only meal I had there (except for one dinner.) It was good but could have been better: the coffee that was served for the table (I was on a tour) was made from chicory and undrinkable. You had to order coffee individually to get a decent cup (there was no charge for this). The breakfast offerings were varied but there wasn't enough choice of fruit. There was a lot of starchy breads and wonderful cakes and pies, though more apt for dinner dessert than for breakfast.
The hotel didn't have any decent maps of Palermo (supposedly they'd run out) so had photocopied a map which was practically useless. The printing was very small and ink was pale.
I would definitely recommend the Piazza Borsa with the caveat that not everything may function as it should.

I was impressed by this hotel. Obviously, group tours stay here because there are always notices posted for group activities. Yet, it never seemed crowded or cookie cutter. The atrium is a wonderful location for meeting friends and having an aperitivo.
The rooms are very comfortable and the bathrooms are large enough to have bath tubs!
I did not have the opportunity to try the spa but saw that it offered good services. Breakfast, as in all Sicily, was extravagant, with great coffee. I loved the location, with so much to see within a few blocks.

Our stay was brief, we were just passing through Rome on the way back to the USA. The Piazza Borsa went out of the way to help us have a great experience in Rome. They arranged a car from the airport to drop us at the Vatican and take our luggage to the hotel as well as suggest a couple of great spots in Rome. The staff was amazing. The hotel was clean and quiet and just a stroll to wonderful sights.