Never used VEA before but I will be for this trip as it is highly recommended and like you said, gives you reassurance that the journey back and forth will be nice and smooth.
Last year we used a private transfer (Holiday Taxis I believe it was called) and it was TERRIBLE. They were supposed to meet us in time for when our flight got into CDG and were over one hour late. We panicked thinking they had stolen our money and wasn't going to turn up. I also had no clue how to work French pay phones but luckily a really helpful worker at the airport rang them for us and sorted it out. She was told for us to meet them outside and that they would be 10 minutes. Half hour later, no show. We were really panicking now as we thought we'd either have to pay a taxi or pay again to use the VEA but it a HT taxi showed up. We were about to get in when we were told we wasn't even on the list and had to wait again. I know it wasn't the drivers fault as he had to stick to his list and a schedule but we couldn't help our frustration at having to wait so long in such a hot day, tired from travelling and just wanting to get to the hotel and check in so we could go and explore the Village. Finally our driver turned up and we finally got underway, though he didn't really talk to us, apart from a stiff hello and then telling us where to sit. We also got taken to the wrong hotel, but I think it was his satnav that led him in the wrong direction, but we finally made it, around 2 hours after we had wanted to arrive (taking into account the drive there too).
Coming back was a lot easier, though it was a pain as we had to call the day before to confirm which was difficult in a noisy hotel corridor and a language barrier but it got sorted and our driver turned up bright and early to make sure we got to the airport in time. No complaints about that and he at least seemed a bit more happy. We had to stop at another hotel to pick another family up, who were late. He gave them 2 minutes and drove off, probably making them miss their plane! So I was glad we got up extra early to be on the safe side!
After all of that chaos, using VEA just seems like the best option!!