You should do a search on the board - I know there is a user that has posted her service numerous times and seems to really like them. Can't remember who, sorry.
We have used Execu-car (a super shuttle service). We found the driver nice and price was reasonable. We even used a discount from the OC website. You can scope it out on the super shuttle website...
This.
We did this last time and plan on doing it again this trip. They have vans so there's plenty of room. Be sure to grab a business card so you can call and arrange pickup the day of your departure.
we used a taxi from LGB and zippy shuttle (private van) on the way to the airport for $45 each, I preferred zippy. Note taxis going to the airport normally don't do flat rate unless you arrange that before hand.
You can use "my guy" Ron ~ his business card says VIP Service (Kim Sontha Transportation). The number is (562) 396-8106 (company number) OR the number where he has always answered is 562-895-6713 We've had a Toyota Highlander & Lexus SUV for our past trips. He's great ~ this past July his buddy Jefferson took us from the airport to our hotel and Ron took us back to the airport ~ Jefferson's # is 909-754-5822
We've had as many as 5-6 people *sometimes just 2 or 3* ~ I pay him $45 + a $5 tip each way.
**We have stopped at a grocery store for a quick shopping trip a couple times.