My fiancé and I stayed 3 nights in Bianca and Cristina's place, and we absolutely loved it!
The apartment is beautiful and clean, it's actually exactly like on the pictures, it's full of charm!
Trastevere is the perfect place to be in Rome, you can go everywhere you want easily and quickly, there is a plenty of restaurant and bar who are actually quite cheap!
Cristina was really nice and helpful!