Does it react to the terrain, or is it just cockpit-adjustable suspension? Because I pumped up my front tire pressure from 34 to 40 and the ride is COMPLETELY transformed. Regular mode used to be "59 Coupe de Ville" and now it's more "'94 735iL". Haven't had a chance to try the handling, I've been stuck in traffic, but the difference in regular mode went far beyond what would be accomplished by mere tire pressure.
I'm getting so much rollover on the front tires it was killing them. If I didn't add more pressure it would have just ruined my tires faster. More pressure will give me better wear.