Please another question: filing i-539

The people at the international office at my school said they could mail the application for me and strongly recommend me using their address for c/o.  But I am not planning on moving back to school anytime soon.  

If they submit the application on my behalf, do i get a better chance for approval than doing it on my own?  I just think I can do it by myself and don't want to take the extra step to mail materials back and forth to my school. 

Thanks a lot!