This is recommended in my guidebook and is close to the place where I stayed, so I went to check it out. It's a Tuesday evening and I could get a table quickly. The staff (a lady) serving me was very polite. I ordered scallops with portobello mushrooms and rice, and a white wine (I told them what wine I liked and asked for their recommendation). The scallops were nice although the rice was a bit too salty for me. The wine was good. For the cover, the bread and butter were nice. Overall the dining experience was very good. Prices are not cheap though.
Could go again next time in Porto.