Own them.. H&R's are good, so are tein's and I believe they have a set for our cars, as well as some others.. Very very good setup, but you don't need them unless you plan to track your car or run it very hard. Otherwise you technically don't need to have coilovers. Most of us that have them never adjust the height very often as you have to get an alignment everytime you touch the height. But to answer your questions, they're awsome, and can be tuned to whatever settings you prefer.. just expensive..
FOUNDER of the BMW-Forums Michigan Club
<span style='color:green'><a href='http://www.cardomain.com/memberpage/458339' target='_blank'> Car Domain UNFINISHED </a> </span>
<img src='http://www.bmw-forums.com/forum/uploads/post-4-1078289877.jpg' border='0' alt='user posted image' />