Well, Sangalhos is not exactly a planned touristic place. In recent years efforts have been made to promote the wines and consequently all the Bairrada region. Which other cities/villages have you visited (besides Porto, Oeiras/Lisboa)?
I haven't visited it yet either, but I'm looking forward too, maybe this summer I will visit it.
I stayed mainly in Porto, which was absolutely wonderful. Did not travel very much, just some villages around Porto, down the coast to Espinho... Then also visited Aveiro and some villages nearby... Well, that is pretty much it