We used Happy Limo last about 4-5 years ago. I have to admit, I thought they were great. Our flight was delayed for 4 hours, and they were there when we finally landed at midnight!!!!
As far as being repsonsible for my own luggage, I get to the airport and do curbside check-in, I get to the airport and pick it up at the baggage claim. The driver was waiting right at baggage claim and took one bag, DH took the other bag, I took the carry-on...wasn't a big deal.
I just having this problem with schlepping on and off buses, having to go to several resorts to drop off/pick people up and so forth.
We like to rent a limo or rent a car. The last few years we have rented a car, because we have ventured around the area a bit more.