Claudia's apartment is impeccable. It has everything you need (washing machine/ full kitchen/ great bed & shower/ instructions/ etc.) to have a comfortable stay in Porto. Every detail has been thought out and the design is brilliant.
The location of the apartment is very central and super close to many of Porto's main sights. Just note that Porto is very hilly/ cobbled and accessing the apartment (like the rest of the city) means that you will need to walk up and down some steep roads. (A bit tricky with lots of/heavy luggage, but doable.)
Claudia was incredibly helpful as well. She met us and helped us park our car, and her communication beforehand was great. She also gave us tips on where to explore/ eat/ drink and all of the suggestions we tried were fantastic.
If you are planning to spend any time in Porto, Claudia's apartment is the perfect base. If our travels ever take us back to Porto, we would absolutely stay here again!