We've used Happy Limo 3x to PC and each time they were great to deal with. Will def use them again for future cruises. Our Oct. 2010 cruise has 25 people in our group and we looked at the limo bus but may need the minibus.
FYI, the limo bus doesn't have seat belts if that's a concern for you. I emailed them a few days ago to ask and was told by FL law, buses aren't required to have them and since technically it's a bus, it falls under that law. Our big Escallade limo we had with them did.