Mostly no reason not to. They're cheaper and 95% of cost is refundable unless you load them to your
MDE. Only issue I see is possibly if you have an issue with your party before, during, or after I doubt Guest Services will do much for you...but that's just a guess. Case in point I had weather issues a couple of years ago to where alot of things cancelled for the night, pleaded my case with guest services the next day, and they gave me tickets to go on another night of our trip. I doubt I could get lucky with that with
UT tickets? With that said, I bought mine this year from them and saved alot.