Two sides of the coin here....Nothing wrong with original rubber bushes-if they are good enough for Army LR Defenders, they can't be bad. Downside is that you need to either cut them to get them out, or preferably use a press, and ideally press the new ones in. Once the original bushes are removed, poly bushes are a doddle to fit and a piece of cake to renew with no special tools or equipment required. I have used both types, original rubber and polybush "Comfort" and to be honest I could not notice any difference for normal on road use