We have used the shuttles before and they are okay. A couple of weeks ago we tried the
Disneyland Express bus service through grayline. The cost was less than the shuttles because their web sight has a coupon that you can print off. The buses were very nice! There were only 10 people when we left SNA and only 5 when we returned to the airport. The transportation was fast and we are going to use this service again when we return in January.