Roomate Finding Service

Has anyone ever utilized a roomate finding servcie such as I am finishing up grad school and need to spend a few months at an internship in Fort Myers starting in October and running through December. I am from the midwestand don’t have any connections in the area and am unsure if I will stay in Florida following gradutaion. Basically I need a place to stay for about 3-4 months and possibly longer.
If anyone has ever found a place to stay through one of these services please let me know of your experiences.