People who have posted on another cruise board compare RO and Denrus to each other favorably and the answer to the question is yes, they also bypass the lines. DenRus seems to be slightly more flexible for those who want to plan their own private tour according to those who have dealt with both companies. People have also said that Princess will tell you that you have to wait until their tours have left, but that they do not enforce it. Just go down to the gangway when it is time to meet up with your tour. We will be using DenRus on our Constellation tour in July.