Me and DH went in March 2014 and enjoyed it. Went for from Thursday to Tuesday. (6 days/5 nights, though the first day and the last day day were taken up by travel as it was a coach trip... So the Friday, Saturday, Sunday, and Monday, were full days there.)
We enjoyed it, but as I said, it was a coach trip, and the people running it made sure we went to all the best places, and organised 2 excursions, and our trip was full board.
So we never had to buy anything, only alcoholic drinks. (And DH wasn't drinking then, so he had coke!) I don't remember it being particularly expensive, but that was 10 years ago, and we didn't buy much. (Just a few souvenirs.) I did give a waitress in a cafe a 7 euro tip (our bill was 23 euros, and I gave her 30 and told her to keep the change.) You'd think I'd have given her a kidney. She was elated. I think they have quite high taxes, and I assumed waitresses were not paid well. I never found out.
Hope you have a nice time @Bridgetjoneski . We stayed in Vianden in Luxembourg, and had a day trip to Bitburg, in Germany. (As you probably know, Luxembourg borders Germany.) And a day trip to Luxembourg City. It was a chilled holiday, and was really nice. And we drove through miles and miles of German valleys and forests on the way back on the last day, and 6" of snow had fallen overnight. It was like a fairytale ... Beautiful! 😄