We enjoyed the tour from Passau to Vienna very much, it was very scenic and overall a great experience. I would have rated the experience higher except some of the hotels were not really 4 star or better and the directions need to be improved.
In particular the Römerhof Hotel in Tulln (regardless of assigned rating) is just not very nice. The property is needs updating and painting. Our room was small, had ineffective air conditioning, needed painting and was really a 2 or 3 star experience. The Römerhof Hotel was by far the least desirable overnight stay on the trip, and we would not want to stay there again. I suggest the tour company reconsider this location for the "upscale lodging" tour.
For the most part the directions and maps were outstanding, except for the last day. The final day directions could really be improved for the area around Korneuburg and into Vienna. This is the most difficult section of the journey but the directions are the least descriptive. It was very hard to stay on track with the directions here. We met several other travelers that got off course in this section.
All in all we liked the tour and would recommend it. Thanks for the opportunity to provide feedback, we appreciate it! Marko and Janet