If you're in a hurry and you don't want to read an endless review, here comes a summary: this studio offers an OUTSTANDING VALUE-FOR-MONEY. I'm an experienced Airbnb traveler, so you can trust me: just book it. At such a low price, you won't find anything better nearby.
If you're still not convinced, then... please feel free to read the detailed review that I'm going to type below.
1) CLEANLINESS: 5 stars out of 5 on this matter. It was spotlessly clean, even below the sofa-bed (yeah, I checked, out of curiosity...).
2) ACCURACY: Gianluca is irreproachable on this matter as well. ALL the amenities mentioned on the listing are available. There is a well-designed and well-equipped kitchen with gas stoves, enough kitchen utensils and cooking pans, a big oven (not a tiny portable one), a BIG fridge (with freezer) that remains quiet and won't bother you at night, a comfortable sofa-bed, a table where you can have lunch / dinner and on which you can work as well (especially if you're a digital nomad), 2 closets / chest drawers with hangers, a TV, and a reasonably-sized bathroom. The only minor defect of this studio is the size of the boiler: it must be small because hot water doesn't last for long. It's enough to take a fast shower though.
By the way, I almost forgot to mention that it's an air-conditioned studio.
3) WIFI: I'm a digital nomad, so that's crucial to me. In this studio, Wi-Fi is not the fastest of Italy (the speed is around 5 or 6 Mbps on average), but it does the job. I was able work remotely without any problems.
4) CHECK-IN: Gianluca lives nearby and he was punctual, so the check-in went smoothly. He explained everything to me in Italian; I don't speak Italian but... I understood everything. ;)
The check-out was even smoother, because I just had to lock the door and leave the keys in the mail box.
5) COMMUNICATION: Gianluca always replies fast and courteously. He doesn't speak English, but nowadays online translators allow us to overcome this kind of "problems".
6) LOCATION: The location of this studio is outstanding. The nearest supermarket can be reached in 4 minutes (walking); Trani station ("Trani Centrale") in 11 minutes. If you have a car, you can reach Bari airport in 29 minutes and... Alberobello in 80 minutes. Trust me: you HAVE TO see Alberobello !
Talking of cars, there are several FREE parking spaces in front of the studio, and there is always one or two that remain empty. Still about vehicles, it should be stressed that this studio is located at the end of a dead-end alley, so there is no traffic at all. It's quiet as in REALLY quiet.
Last but not least, the neighborhood looks safe, even late at night. Neighbors are quite friendly and... they are Italian. It may sound obvious, but it's not always the case in Italy, if you know what I mean... ;)
7) VALUE: as far as I'm concerned, in June 2022, I pay around € 42 / night (taxes and cleaning fee included). At this price, this well-maintained and quiet studio with air-con, free parking spaces and without any major flaws is a REAL BARGAIN.