It was mid winter and a very small group - just three people - who were ready to come home before time but the mini van didn't appear until 7:10pm, after the group being asked to be ready to go at 6:45 - which they were. Other than this, no problem - good people, good price and felt safe.
Transportation to and from Disneyland itself was great! No problems finding tour office, checking in and getting to the park early! Pick up from park went smoothly too, bus was where they told us it would be! The reason behind my rating was the fact that our park admission tickets would not work at the entrance! We were made to stand in the Guest Relations line for well over an hour which greatly cut into our time at the park! There were 60 people on our bus and none of our tickets worked! No blame goes to Viator, it rests solely on the tour operator, Paris City Vision.
Everything went smooth there was no problem at all. The only down point was it was a rainy day - but that didn't stop us to have a very pleasant day at Disneyland. We visit only the one park there was no time for Universal as well. We really enjoyed Disney in Paris and meet a lot of characters. They were on time and well advertised. Hopefully we can come back soon.
Nov 2016. I will definitely recommend using the Transfer from Paris Central option. Make everything so much easier.