This will be a personal/Family size choice. MV's will take you anywhere on property...
HOWEVER - worth noting that the PRICE is fixed at $25/trip. Please, compare with even a MEARS cab? My Dear wife and I use these exclusively...
WL to GF? About $10
WL to Contemporary? About $10.
WL to Dolphin/Swan? About $25.
Either direction, with a solid 20% tip
. Yes, UBER may be less.... we just do not choose to use UBER.
Worth noting? MEARS has about the same vehicle capacity that a MV does.... just let 'em know the size of your crew
.
One exception: If WDW traffic has been impacted by a wreck, or huge Special Event? MV may win, as it is FLAT FEE, regardless of how long it gets stuck in Traffic. Taxis work on Time+mileage.
All personal opinion - I'm not necessarily right, no one else is necessarily wrong.