I stayed at Guido's place with three friends for five days and we had a fabulous stay. The apartment has everything you need and the location is spectacular. It was easy to walk everywhere in Palermo Soho. It's two blocks from Plaza Serrano, where there's great bars, restaurants, and on the weekends a lovely bustling market that's a good place to pick up souvenirs (but go after 2pm!).
Guido was great with communication as well, every time we had a question about anything (like setting up taxis, laundry, figuring out the water heater), he responded within 10 minutes. He was also so sweet to let us stay late on the day of check out because we had a late flight and nobody had booked the apartment for that night. If somebody has booked it, he offered to securely store our luggage for is after check out at 11. Guido was great!
Would 100% stay at this cozy spot if I come through BA again!