Julia's place is amazing, and I strongly recommend staying there.
She was very accommodating about check-in (we had to return a car to the airport first and ended up being late). The room and private bathroom were both spectacularly clean and comfortable. The shower was awesome, and the house decorations were very charming (lots of cross-stitches done by Julia!). We stayed there for three nights and had lovely little breakfasts in the mornings (tostada and coffee), which were very much appreciated. Julia is super kind.
I would definitely visit Madrid and stay here again! 100/100 :)