so far the review of the rings are good for going over yellow lines?

OK. sorry.. my my......

what I actually meant is which is better in term of improving stability and increase comfortness

seems like you've had stiff ring for quite some time. mine sharing if there's any difference performance on your ride today compared with the first day you installed it? doesn't matter if it's just a placebo effect, just interested to know your opinion.

I think those stiff ring are made to be "soft so it can be "mold" according to the joint surface. So it does look like coca cola tin i guess.
Question, do they sort of put some glue on the stiff ring? Scare some mechanic throw away thatstiff ring after un screw something. or even if they put back, it wont be d same liao.

hmm ye keh? but from all these website stiff ring, stiff collar stiff peni s....ohh waii 

it seems like they are made to be soft. look at this diagram

Installed on my old Civic...  after reading many people say there are improvement.

My honest review after installation... Total and utter waste of money $$$ 
Feel exactly the same... didn't help with comfort, noise, viration, handling.

ya... I know that's one of the reason I thought give it a try without spending a bomb...

Anyway.... just live with it.... another reason why I always advise others keep stock standard... dun waste $$$ modding. 

Got an acceptable ride and handling after adjusting my suspension several times. Should have done that first rather than trying out the stiff ring. 

  Maybe you and others just have more sensitive butts.... hahahaha 

really no cons at all ? how come such good thing still no one really know about it ??