This is one of the most dumbest movies in the history of cinema
SPOILERS.
I'm just gonna get straight to the point, the main characters get their minds erased so that they don't remember their former lovers. And at the very end they still find each other and decide to give the relationship another go, we see them running around and laughing with each other at the very end. It all seems great, but let me tell you something, if we don't have bad memories how are we ever going to learn from our mistakes? The 2 main characters will end up repeating the same mistakes that they made before because they haven't learned due to having their memories wiped away.
It may be emotionally painful, but bad memories have a positive aspect which is to learn from our mistakes and not repeat them. Clem and Joel will continuously go through a vicious cycle of making the same mistakes over and over again.
As a Brit i know that Kate Winslet can do better than this piece of crap pointless movie, i don't know why she accepted that role.