The apartment is quite nicely renovated, in a very convenient location, with beautiful views of Vila Nova de Gaia out the windows. It's basically right over the Don Luis bridge, giving access to both the upper and lower levels of the old city as well as the port houses on this side of the river. It was a perfect base for our time in Porto.
And Telmo himself is delightful. He also runs private boat tours on the Douro River. We took an awesome trip with him under the 6 bridges, including a picnic lunch and swimming, which was one of the high points of our time in the city.