backtracking is good when done well(metroid prime, super metroid for instance). some of the backtracking in SS is just terrible, especially when they make you go back in skyview and the door is relocked, wtf is that? it'd be one thing if they let you progress quickly to the back of the dungeon again and then there was an additional few rooms you couldn't reach before because you didn't have the right item, but that was just idiotic.