The Germans originally invaded Crete by using paratroopers dropped from Ju 52s. They did indeed take very heavy losses - so much so, that the Germans never again launched major paratroop operations. But the British and Dominion forces on Crete overestimated the strength of the Germans and underestimated their own position - and the Germans won the battle.

Again, Beevor's book gives an excellent account of the story.

__________________
"Stand by to pull me out of the seat if I get hit" - Guy Gibson