We used Lyft to get from CBR to AK around 6:30am. Following the closure of WDW due to the Hurricane a few weeks ago, AK opened earlier at 7am the next morning. However, buses were not running that early so we opted for Lyft (similar to Uber). We waited less than 10 minutes.
We also used Lyft to get from AKL back to CBR late night after dinner at Jiko. No problem.