Marta's apartment provided everything we needed for our one week stay in Porto. The room where we slept was nice, and it was great to use the big terrace/balcony for breakfast. Most of the time we had the apartment for ourselves as kids had school holidays, and the family was most of the days enjoying the summer. Using the kitchen we usually made shifts - waiting for the family to have their food first or they waited for us - this worked well, and again the terrace was very practical for us. Only in the morning sometimes many people wanted to use the bathroom at the same time, and so one had to hurry up. But it was also fine.
The area is really great for holidays - you have the beach just 15 minutes away by foot, the metro stop is close by, and there is the bus line 500 following the coast line towards Porto center with a great view that can be accessed close to the beach, too. Actually it would be possible to spend days only exploring Matosinhos as they have many cultural sites, monuments, museums, restaurants (and the beach). We also found besides uncountable other ones two delicious vegetarian restaurants in ten minutes walking distance from the house, which is great, because most food places only offer fish and meat, and if you are vegetarians it's otherwise sometimes tricky.
Although you find many bus lines and also the metro, public transport in Porto is a bit tricky. The zones system is hard to understand, they have many exceptions, and even the people in the metro shop couldn't explain why certain connections count for a certain amount of zones. However, there are 3-days-tourist tickets which cover all zones, and for us these were finally the most conventient ones.
Finding the entrance of the part of the block where we needed to enter, and later finding the right door for the apartment was a bit tricky for us - because we were not used to houses with several numbers which seem not to follow a clear order, and signs of the numbers were partly hard to find. So best to ask before your arrival for a description how to find your place - however, after a kind of difficult arrival it was no problem anymore to understand how to do it.