We just got back from a stay in the cars section. We had some issues with the wifi working in the room on my kids ipod. You had to find a sweet spot. It did not work at all at the cars pool. It worked fine at the nemo pool.
The ac was a probelm only at night time. I am not hot by nature and had read some of the issues. I figured we would be fine. It bothered my family. I woke up hot alot. I would get up and wave my hand to try to get it to come on. If you are moving around in the room it was fine. I didn't mind it catching up while we were out either. I ended up going to sleep with just the sheet. I felt a little cold at first but it did help when the air wasn't running through the night. I do think this needs to be fixed and it would may prevent me from staying there again.
Besides that, we loved the cars suites. Loved the room, the pool, the details. Loved the view from our room. I was really sad my first night home when I looked out my window!