Has anyone used Vacations by Rail in Spain. The itinerary includes Madrid, Seville, Granada, Córdoba, and Barcelona. It’s a 10 day guided tour. There are only a few reviews on the site.
There have been some previous questions about that company, not necessarily related to Spain. You'll find some of them among these threads:
Forum search results for "Vacations by Rail"
I'd start with this thread: January 2024 thread
As I indicated on the thread acraven linked, I am on Trip Advisor a lot. Here is a link to the Train Travel forum search results for Vacations by Rail. The 1st thread that comes up is SIX years old and has had people posting complaints as recently as last November. FYI, if threads havent had activity in 6 months or so TA closes them so people can’t continue to post, meaning this topic has been active for the whole 6 years.
https://www.tripadvisor.com/SearchForums?ff=12483&geo=1&scope=2&q=Vacations+by+rail&pid=34633&s=+