I changed all of mine from OEM rubber to powerflex and the difference was phenomenal, it made it feel like a new car. There is no more vibration, and they actually improve the ride, bumps it used to crash over are now taken with a much more supple yet tight feeling. Steering, braking, acceleration, everything really is much improved and happens quicker as the bushes aren't taking up all the slack first. They are also a million times easier to install. Don't know about tyre wear as I haven't had them on long enough, but my last set lasted nearly 2 years so not the best one to comment on normal