We have used a taxi once and Uber once to get there and back from Disney property. Uber was significantly cheaper, and I highly recommend it. There are a lot of codes out there to get your first Uber ride for free - look into it!
We used a car service about a year ago and if I remember correctly it was $100. So if you can get Uber or Lyft for $20 each way I would definitely go that route. Even with a tip you'd be half the car service cost.
Same as Uber. Different company, mostly the same drivers. Lyft charges by actual time & mileage; Uber charges a predetermined fare that they claim is based on estimated time & mileage. Either may add a multiplier during times of high demand.