35% tint on every glass except the front windshield which was untouched (he highly suggested not to because of strict NY laws). There was no privacy glass stock on mine. The other side being dark makes certain angles darker. I watched as he put the tint on... having just 1 window tinted, I thought it would be too light but once he was close to finished the whole thing looked darker because the inside was darker.

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'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