Porto is an amazing city and we knew it at the first time we met Sílvia. She is a great host and she provided us all the support we needed, also she was always in touch. The apartment is well located, clean, well illuminated and it smells good! There was everything we needed (and also some wine!). The hot water was limited, but the time was enough to wash (and to be ecofriend). You should open the shower little by little, so you'll have hot water more time...
I strongly recommend this place for your stay in Porto. it's for sure a great memory!