As above. Despite the mediocre reviews, I still felt this is good old Broken Sword at heart. The game was slow at first, but then it became interesting just at the moment that Episode 1 came to a close.

I remember Revolution mentioned somewhere you don't need save files from EP1 to play EP2 however I can't find the topic now.

You can always store saves somewhere and delete the game if you are worried about free space.