Booking was easy, but I didn't realize that this company is just a broker for 3rd party tour companies. Paris City Vision actually delivered the tour.
Pros:
Overall it was a great experience. The times of arrival and departure were prompt and the bus was comfortable.
Giverny was not too crowded and we had plenty of time.
Lunch was at a Picturesque restaurant in a small village and was quite good.
We enjoyed meeting other guests who were seated at our table during lunch.
Our tour guide, Sandrine, was knowledgeable, friendly, kind and very patient
Cons:
Audio was very poor quality given the disposable headsets.
Our guide was hard to understand due to a combination of poor audio quality and her accent.
Versailles was very crowded, though clearly not a problem created by the tour company.
Some tour participants refused to wear the headsets and never listened to the guides. They were always behind schedule and delayed our departure from Giverny and Versailles (again. not the tour operators fault, but frustrating nonetheless).
Check-in was a bit off as the local representative didn't recognize our confirmation number and at first told us we must be with a different company. I insisted that she look up our names, and that solved the problem.