I like that you can use it to add multiple people's information quickly without having to log in or remember what camp/league they are trying out.
It gets rid of errors sometimes if not done correctly when adding someone and also keeps track of how many have registered so far. The fact that it can be used with more than just one sport makes this tool great because we do 3 sports here at our school! Sometimes there will only let us create a page once per week, but even then its still better than doing everything manually and having tons of error.