Overall this appartment is lovely but has some negative points. The light and location were perfect. It's a typical Italian flat with lots of stairs and lots of character. Balcony is lovely, even in winter. It is in the centre of Trastevere so it is noisy Thursday-Sunday (we stayed at the end of January/beginning of February so perhaps relatively quiet compared to the summer so I imagine very noisy then). We stayed for 10 days and wanted somewhere to cook. We went out to eat a lot of the time but found cooking at the appartment wasn't ideal. The oven didn't work but the grill did. The kitchen had plates, knives and forks etc. but lacked the daily essentials such as washing up sponge, teatowel, oven gloves and other cleaning stuff. We had to buy cleaning products and wash kitchen items before using them. It wasn't particularly clean when we arrived.
It's a great place to have as a base to return to, to sleep and rest but I wouldn't recommend for long stays. The host was pleasant but there's nothing over and above to make the stay special. No extra frills and it is careworn.