I'm not Portugese, so take it with a grain of salt.
The chicken for the most part is pretty delicious. The peri-peri sauce is the reason I make repeat visits. Price-wise, it seems a bit higher than usual for chicken, especially as home-cooked chicken is easy and tastey.
My advice is to go for the double leg - make it spicy as well - it has a good kick that flavours the meal. The spiced rice is a must, and if you can, get the peri fries as well. Simply astounding.
Don't go for the chicken wings pack - last time I tried that I found that the chicken wings were small, dry, and somewhat questionable shapes.
Other than one visit, most other visits were timely and quick.