Flying with others on board not only makes for a more a social experience but has safety and educational advantages as well.
It never hurts to have extra eyes looking out for traffic and, as long as they approach the flight in the right spirit, low-time pilots can encourage each other to develop their skills and watch for any bad habits that might creep in.
Of course there should never be any doubt about who is the pilot in command on any particular flight.
Unfortunately I can't fly with you - I'm on the other side of the world.