This seat seems to me very badly designed from a standpoint fixing / security. The lower slots for the passage of the seat belt are located too low (under seat OPAL) and offer no maintenance once the boxes clipped to the belt are above the level of the back seat. I tried it on my 2 vehicles (manufactured in 2009 and 2012) and no 2 do not allow proper attachment. I think a lot of satisfied buyers have not tested the effectiveness of keeping this seat ... Too bad its design is quite successful but it is better not to play with security ...