On mine the first set I installed was lower front and it made a difference in the steering on road. Much less steering correction , worked great. Lower rears were next and then I just noticed a hair more shock from hitting expansion joints in concrete roads or similar things. Once I did the uppers the ride felt like I had leaf springs . I then swapped to all Metalcloak Duroflex joints on the existing Savvy arms and it as smooth as you could ever imagine and steering is still tight.
05 TJ Rubicon 4.88s ,3&2" BDS, 1.25" JKS BL Bilstein 5100, Currie Currectlync , Savvy arms/Metalcloak Duroflex joints, 33"Cooper STT's, Mc front Track Bar