Lexus GS250, completely rattle free 3 years, 35000 miles down the line
The same with a BMW 7 series, 5 and a half years 120.000 miles.
Lexus CT had rattles from day 1.
The RX had rattles that massively improved after the plate was fixed a bit better.
I get the occasional very annoying rattle, probably from the buckle.
One evening I had some loud noise coming from the back of the car, but the next day it disappeared.