We really liked our stay in this appartment. The Trastevere is really a great place to be, very close to the center and very pleasant to walk in and to go eat or drink at night.
Luis was very nice, giving us advices and help whenever we asked and always responding quickly to our questions.
Just make sure you can see the house rules because there is 30 euros extra for late checkin and 20 euros cleaning that are not included in the price we pay when we make reservation, and we only noticed that after.
Otherwise we really advice this appartment, the Trastevere and Luis.