I wanted to share our experience with Chamexpress: the drivers are rude and unfriendly. No attention to customer satisfaction whatsoever.
We booked through internet and got 3 confirmations emails. One of them stated the pickup time as 9:00 AM. We were ready at 8:45 and yelled at by the driver saying that we should be ready at 8:30. One of the emails (the one that is the ticket) stated more clearly the pickuptime. Our fault was not to check all three emails but I do not think we deserved such rudeness.
We started our trip and find out that the baby seat was not fixed to the shuttle. When we mentionned that to the driver, the reply was that it is not the responsibility of the company. Imagine attaching the baby seat that you are unfamiliar with while the shutlle is moving. The directions were printed on the baby seat but were not easy to read (worned out)..
Another point is if you travel with a baby make sure to select the baby seat option, the fact that one of the passenger is a baby do not ensure that there is a baby seat ready for you. Furthermore, if you decide not to use the service because the baby seat is not available it is not transfereable to another date.
To make the story short, we had a very unpleasant experience with chamexpress and heard similar dissatisfaction from others.