Thanks to both of you for taking the time to reply.
My question was more about the process involved in actually updating the Macbook Pro from Lion to Mountain Lion. Is it easy to do, or can you screw it up if you make a mistake?
Thanks
I did the upgrade from Snow Leopard to Lion through the App Store. If I remember correctly, it suggested that I back up my data before starting the process. I never did run into any issues during the upgrade process and it took around an hour to complete the upgrade.