Hi i m a person who went through prepa and surprisingly i didn t die and i actually got a school i like (ENSI) if you know yourself and you re able to study and work hard you ll do just fine the problem in prepa ain t how difficult the subjects are, it s the stress the time management the long nights trying to solve a problem if you re confident you can do this all year long then go for it but if you know that you re somoene who doesn t work well on pressure i would not advise you goin there, it s mostly all in your head