Its always crowded at DL so mousewait users are always there and on the app updating wait times. If you are going to the park, and using mousewait, create a user login and contribute to the app by updating wait times. (they do not spam you when you sign up) I was at DL last Wednesday and the wait times were current throughout the day except real early in the morning when it was dead. (so I updated them!)
And do not pay for the premium version. The free mousewait is pretty much the same thing.