We sailed on the Serenity in April, 2018. We cruised with Vantage. The trip began with two nights in Madrid. Then we were bused Salamanca for lunch and a walking tour before proceeding to Vega du Terron, Spain where we embarked. As soon as everyone was on the ship, we took a short ~10 minute cruise to Barca d Alva, Portugal. It turns out that it’s a lot easer to load luggage at Vega du Terron.
While most Douro cruises run from Porto to Porto, Vantages cruises are one-way, from Vega du Terron to Porto or vice versa. Most Douro cruises do the same excursions: Castelo Rodrigo, Mateus Manor, Avessada Winery, Lamego, etc. So I won’t dwell on these, but focus on the ship.
The 237 sq. ft. cabin was comfortable and quiet. It had a balcony, but we didn’t use it that much. Despite being a large cabin, it seemed a little tight at times. We were a little frustrated that Vantage discriminated with the soaps and toiletries. Only President’s Club members (at least 3 previous Vantage trips) got the L’ Occitane toiletries. Balcony had a glass window that could be raised and lowered. Balcony tip: If the window is open, the air conditioner won't turn on!