Set was complete when put together a couple years ago. It has sat on display and was recently disassembled. As I can't say for sure that no pieces fell off, were snatched by kids, eaten by cats, or disappeared for any other reason in those 2 years on display... this set is being listed as 99% complete.

Comes with box, instructions, and all minifigures

Description from Lego:

The Empire has discovered the secret Rebel base on Hoth! Defend Echo Base with the snowspeeder and firing laser turret. Turn the gear to open the sliding blast doors, but watch out for the Imperial probe droid and the snowtroopers with their blaster cannon! Limited edition set features detailed command center, rotating repair platform and crane and removable spare engine. Includes 7 LEGO minifigures: Luke Skywalker, co-pilot Dak Ralter, 2 Hoth Rebel troopers, 2 Imperial Snowtroopers and all-new K-3PO protocol droid.