Don't ever go to study in France, seriously. Even La Sorbonne won't lead you anywhere... As mentioned on the above, it's very easy to get in (a French person only needs to get his or her baccalauréat with minimum marks, and they're good to go) and you will end up with some random people that aren't passionate about anything.
Plus, the undergraduate studies take place in Tolbiac : ugly building, sad people, teachers that don't care about you understanding or not, constant blockades, the administration driving you nuts... a few of my friends do study there, but as most of the people I hanged out with in high school had at least a bit of ambition, most of them decided not to ruin their own lives - and for those who went there, wel... It's all about regrets and complaining. It's not specific to La Sorbonne though ; French universities are **** as they can't select their students and they have no money to invest in decent facilities.
I know how living in France can sound appealing, especially Paris which is indeed a great city to live in, but you would regret it, I swear. Stay in whatever country you live in right now, it must have a better higher education system. It kind of hurts to say this but... French universities are why I've decided to go in the UK, after two years of prépa (intensive and selective programme, still to avoid going to French uni) and people who want to do something with their lives are all flying away from here. Would be a huge mistake to go there.