2006 Platinum/Ebony,2011DTS,Platinum Edition White Diamond.
Why would you want to lower it? Living in Canada you are going to find if the snow is more than four inches on the roads you are going to be having problems as it is. Then again maybe you are not planning on driving it in snow.
Yep, it's a very easy adjustment, and drop varies from car to car (anywhere from 1/2" - almost 1"). Mine came down about 3/4", looks much better at none to minimal sacrifice in ride quality. I can't actually tell any difference in ride and it certainly looks better.
Car should be realigned after this adjustment.