This is a self-guided tour - you are given a small mp3 player and sent on your way. It's a very interesting tour, but full of information. By the end, I was a bit overwhelmed and looking at the part where they crush the grapes, it would have been nice if there was a person there to answer questions and point out the more specific things you are looking at/for.
We were a little confused when we first arrived as to where we were supposed to go. We wandered into what looked like a small canteen/cafe (with port on the shelves for sale), but were basically ignored by the woman behind the desk, so went looking elsewhere. Turns out we were in the right place, so perhaps a little customer service training would help a bit. I finally asked her where to go for the tour, and she started pulling out audio players, so I guess that was it!
Later when we finished, she poured our port tastings, which were great. We ended up striking up a conversation with her and she turned out to be a friendly enough person, so I think it's just that the place could use a little polishing up if they'd like to be a tourist attraction.
Oh, bring some bottles of water and wear a shady hat!