Getting there by car is a bit hard, but Sonia will help you with the last part. She is really kind and helpful. The parking is really close and safe. The location of the apartment is also great, directly in the centre of Gaia and close to the bridge to get to Porto. Only downside is the noise in the evening, so bring some earplugs if you want to sleep with a window open. You'll need to climb some steps to get to the apartment.
The apartment is nice and the kitchen has a lot of stuff to use.
I would definitely recommend this apartment to people who want to explore Porto by foot.