The host was nice, but this place was not at all worth the 3,000 euros per month that we paid.
To someone who doesn't know Lisbon (like me), this is probably the most wild and crazy part spot of Lisbon. You will be kept up all night, almost every day of the week, but screaming drunks. If you close the windows, it's not so bad, but it's extremely hot in summer with no AC. The wifi was inconsistent and slow. The furniture was pretty bad and dated, the glass table top was broken when we arrived. The weird mismatch carpets were sticky and hard, like they hadn't been cleaned properly in 10 years. The bathroom smelled awful (from the pipes?). There are glass windows above each bedroom door, so all light spreads into each room (should be covered up). No vacuum (generally nice for cleaning during long stays).
So, it's a cute place with a nice view and lots of potential, but needs a total makeover if they're going to charge these prices. You're better off staying a bit further from the center and taking the metro in.