In March 2020, I booked a September 2020 Seine River cruise with Vantage. Paid in full. Covid was just taking off, and I was assured that if they had to cancel the cruise, I would get a full refund. Ha.
The cruise was, of course, cancelled, but they refused to admit that it was cancelled -- even though they had already planned to move the ship from the Seine and would not be offering any Seine cruises past 2020. They kept insisting that the cruise was "postponed." (One agent said that is what the lawyer told them they could do to get around the refund assurance in the contract.)
I'll skip past the many months of frustration trying to communicate with Vantage. (Once they have your money, they have little need to respond to your email. I couldn't get a word out of them until I filed an official complaint with the BBB.) If I wanted anything for the money I had given them, I could take a late October 2021 cruise on a vessel leased from CroisiEurope. A good company, but one specializing in value cruises, not deluxe. And a significantly different itinerary, which I never would have chosen in the first place. (In fact, I had looked into taking a similar trip with CroisiEurope before settling on Vantage.) The trip was adequate, but not worth the money -- or aggravation -- that it cost.
Verdict: I will never give Vantage another dollar of my money. There were many long-time Vantage customers on the cruise who were saying the same thing.