Studio star is excellently located in Rome, everything is really on walking distance!
All major attractions, the various areas for nightlife, like Campo del fiore, Trastevere and other Centro Storico areas.
Tommy is a super nice host and very helpful in suggesting and arranging restaurants, activities etc.
If you have special restaurants you want to go to, ask Tommy to make a reservation in advance for you.
The studio is nicely decorated and has wifi.
The only minor cons for us were that my cell phone had only coverage near the window and that there is not much space available to put your luggage away.
But all in all, I am pretty sure our next stay in Rome will be in Studio Star again.