It's well worth it if you're staying for more than a week. This property has everything you need for an enjoyable stay.
Also, the property manager, Andrea was great. She kept constant communication with us and made sure we had everything we need. Even during the booking process she took good care of us.
If you're doing Disney, this is as close as you can get and have a comfortable, affordable, and nearby place.
Sea World is further up the road, and it's just a matter of timing your trip. You can't escape Kissimmee traffic no matter where you're at or where you're going.
Having a Walmart right across the street makes things very easy.