Hey Metaxa,
Legal tint in Ontario is 35% front driver & passenger window, and all windows behind the "B" pillar can be as dark as you like (5% is the norm) - My 2010 Vibe has 20% fronts & 5% rears - never been bothered by police (I usually keep the sunroof shade open to "lighten" up the cabin if there are police on the prowl
) - I have had the tint for 2 years now, I got it done here in Oshawa @ Ultimate car audio (they use a outsource company called "UR" UniqueRidez) Excellent job, had it done in about 2 hrs & he also does mobile. They use the Llumar film which carries the lifetime warranty (don't go for anything less) - As ColonelPanic mentioned & I can relate to it, backing up @ night can be a PITA - I have LED reverse lights which help with output, but it still is not sufficient - I usually find myself dropping the window or opening the door in some cases to see what I am doing - I am going to be upgrading my LED's to some Higher power LED's - Just as a note, they do make HID reverse lights now which would be ideal, so that can be another option - I have had this set up on my Cavalier as well, I love the look & understand the sacrifice of night driving, but that's the trade off for looking good!
- Hope this helps, Happy Tinting!