I didn't realize I needed to specify beyond Bilstein, so my shop installed the HDs. It's nowhere near the point of trying to negotiate a re-change after a couple thousand miles, but there's definitely more harshness over rough spots, and if I were to do it again I'd go for the Comfort version.
'97 SL500, 40th anniversary edition
'04 Olds Bravada (SWMBO's)
'06 Lexus ES330
'89 560SL (sold)
SL--Anything else is just a Mercedes.
(Kudos to whoever said it first)