Thanks for the reminder that I need to do that!
I use super shuttle because I only need one way, and they discount it. Also, there are always super shuttle vans at the airport for pickup -- not a set time like Disneyland express. And, while they do make multiple stops, they drop you *at* your hotel, not "curbside" at a bus stop, like the Disneyland Express may do depending on your hotel.
I'd check out Supershuttle (and google for coupons) and also Disneyland Express (http://graylineanaheim.com/shuttles.shtml)
I have used both SuperShuttle (2003 and 2006)and Disneyland Express (2009) in the past and I have to say I prefer SuperShuttle.
Both times I have used SuperShuttle we have only waiting about 5 minutes at the airport for a van and were the first people dropped off at our hotel.
With the Disneyland Express we had to wait 15 minutes for the bus to come to our stop and then had to wait for it to make 3-4 more stops before leaving the airport. We then had to go to the DLH and wait for them to collect everyone's money or vouchers before getting dropped off at our hotel. On the return trip they picked us up at the hotel and then made a stop at DLH for everyone to transfer to their respective airport bus.
We have another trip planned in November and we have enough people to justify paying for a private van through SuperShuttle (only $16 more than a shared van). I plan on doing that or getting a Limo if I can find a good price.