The factory "tinting" is really just smoked glass, not an actual tinting film. I have limo tint (5%) on my side back windows and 20% on the front side windows and the rear window. Also a 5% glare strip. I like it because the back windows are pretty much opaque from the outside (can't see in) even in direct sunlight and the front windows are plenty dark enough. It takes some getting used to at night since its like a cave but you just have to watch a little more closely when you back up or switch lanes. You could also do the 35% thing and that would most likely give you pretty good results too. Heres a pic of mine if you wanna look:
http://www.geocities.com/shortbus901/my_shortbus.htm ------------------
-Shortbus-
'00 XE 4x2
Solar Yell
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"If you are having a bad day and it seems like people are just trying to piss you off. Just remember it takes 42 muscles to frown and only 2 to pull the trigger of a decent sniper rifle."
[This message has been edited by Shortbus (edited 02-28-2001).]