We were on a Transatlantic last year and used Spain Day Tours for a full-day tour of Seville and the Alcazar.
We had such a great experience, we booked them again for tours in Cartagena and Palma, Mallorca during our recent Transatlantic in April/May 2019.
Spain Day is organized and responsive, and we had no problem finding our tour bus when exiting the ship. Each tour guide we had has been informative and personable and, most importantly for those of us who do not speak Spanish, very understandable. The bus drivers are competent and attentive, the vehicles clean and comfortable, and the tours are amazing.
We would recommend Spain Day to anyone considering their services.