reindexed torsion bar keys.. do they work?

[DeLeon]

Hey guys, I know this has been already discussed but I can't find the information that I want in previous posts... basically I want to level my h3 and I've been told that if I use the reindexed torsion bar keys the ride would not suffer at all... have you guys tired those reindexed torsion bar keys before?

Do you know if they really make a difference or should I just go ahead and lift the front by doing the torsion bars without those bar keys?

Here's the link to the ones I want to buy: