I really enjoyed my stay here. The location is great with just a quick walk across the bridge that is just around the corner to get to Porto. The view was fantastic, and there were a lot of beautiful sunsets to be seen during the stay, and to be honest the photos doesn't do it justice :)
Good to be aware of regarding the location is that there is a bit of a climb to get to any of the grocery stores on the Gaia side, or the Porto city centre. Also be aware that on the floor below is a café that on some mornings at opening has some semi-loud conversations going on. It didn't really bother me since I was getting up early, but if you are a light sleeper it might be good to bring a pair of earplugs just in case
The internet was also surprisingly fast, and if you want to go for a morning run there are good options away from traffic. There is also a little beach nearby if you follow the canal to the east if you don't want to go all the way to the coast
All in all I really enjoyed my stay here