The bottom half feels so lightweight and flimsy I'm afraid to put any real weight on it. I was insecure about my other SUV's tailgate drop which is big/heavy and makes up 50% aside from the top (glass)... and I have been afraid to sit on that. This smaller piece on the X5 seems pretty useless other than to keep things from sliding out. It also does a good job of preventing the auto-tailgate close if you don't actually slam that bottom half shut.

__________________
'08 X5 3.0si - Alpine White / Saddle Brown interior
Specs: Sport Pkg, Premium Pkg, Tech Pkg, Comfort Access, Aero Kit, Style 433 staggered 20s on Conti DWS
Mods: Carbon 35 tint, LED angel eyes, GP Thunder 7500k fogs, H&R 20mm/25mm spacers, clear reflectors, gunsmoke-tinted taillights
Coded: Digital speedo, windows/sunroof/tailgate close via keyfob

X5 pics at Flickr