It's always a crapshoot. I've had UC rentals at about 10 different locations so far including TPA and MCO. I can't honestly say that one was better than the other out of those two. I'd choose whichever location is more convenient. At Orlando it's nice since the cars are located at the terminal (no shuttle bus required). At TPA, they literally just opened a brand new rental center but you need to take the SkyTrain to get there if you're flying in. Then again, if you're a local renter, it may not matter all that much.