Being on the same side as one of the greatest footballers in history a) you're going to win a lot of games b) you're going to lift a lot of trophies and c) you're probably going to get better at the game.
However, there are downsides to sharing a dressing room with the Real Madridsuperstar. As well as not being able to get anywhere near the squad's communal hair gel, you also have to put up with an ego the size of Spain.
An ego which means that, during a training session when the head coach isn't around, there is only going to be one man who thinks he's running the show. Yep,Cristiano.
Just check out the video above to see what we mean - the multiple Ballon d'Or man tearing a strip off one of his fellow Galacticos.
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Real Madrid stars prepare themselves for another dressing down from Ronnie
Taking it upon himself to ensure his colleagues maintain the necessary Cristiano Ronaldo-like standards, the Portuguese snaps and yells at the Colombiaan: "James - mete la cabeza, hermaano!"
Or, in English: "James - sort your head out, brother!"
Grr… scary stuff from Real's talisman. However, the most revealing thing about the whole clip is Marcelo's reaction to this almighty rollocking:
Rather than quivering in fear, the Brazilian struggles to contain his laughter.
Which suggests Ronaldo is not about to turn into a Roy Keane-type captain any time soon.
Cristiano Ronaldo is fit to face Manchester City in Real Madrid's Champions League semi-final second leg on Wednesday.
The former Manchester United forward has missed Real's last three games - including the goalless draw in the first leg at the Etihad Stadium last week - with a thigh injury.
But he returned to training on Sunday and has since played a full part in training ahead of Wednesday's second clash at the Bernabeu, leaving head coach Zinedine Zidane convinced he is ready to return.