I have been to LbN twice now. The food was incredible both times. I have yet to try the AYCE fish platter, but I can attest to the Carne de Porco a Alentejana which was phenomenal. The fried potatoes don't get any better. While the dish was a bit salty for my taste, the generous servings and use of cilantro makes it a must have...again.
The salsa garnish/marinade on the Bacalhau a Casa was also delicious. And for an appetizer, the grilled vegetable platter and calimari (not fried and not rubbery!) were perfect to share among 5 of us.
The extensive wine list also allows for reasonably priced options to pair with your dinner.
I'd highly recommend LbN for the food and service.