)I've used then on and off for years. Service is much better now that they are onsite. Lines can still be long though. Since it takes a long time for checked luggage to arrive at MCO, I usually pick up my car downstairs and go back for my bag if I have checked anything (Now, for those of you who are worried, it has never arrived before my return!)
I once had the most pushy insurance spiel ever at Alamo (and I rent about 20 times a year in different cities).
Otherwise no problems with cars, and lines are a little shorter than they used to be offsite.
Did have an issue once when I left a small bag in the glovebox when I returned the car at the Wyndham Palace - I called back 30 minutes later and they told me that they car was already rented, was being dropped off out of state, and too bad. Very poor lost and found experience.
Another time the auto shut off didn't work and I had gas spilled all over me while refuelling - they gave me an extra day coupon (they obviously could smell me coming!
Overall tho they are pretty good.
I do find that Dollar has the best service of the MCO 'cheaper' rental agencies, both at MCO and DTD