last month... It took just a bit over an hour - but we did not travel during heavy traffic times (deliberately - we have seen the back-ups on I-4) .. We left Kissimmee (Rte 192) around 9 or 10 a.m. - headed back around 7 or 8 p.m.
There were oodles of florida troopers long this route - every few miles. It is not a bad ride, and my kids really enjoyed Busch Gardens!