I have had them on my SWB s3 for about 15 months now. They give you a huge amount more articulation off road and they soften the ride out on the road. When I put mine on I went all over looking at price and the different brands of spring in the end I went for Brit-part. Some of the cheaper brands had a reputation of flattening out after a very short time; some of the more expensive brands were out of my price range. I went for 2 leaf at the front and 3 leaf springs at the back. For the first 8 months of having them on I kept standard oil filled shocks which worked fine, I have now got gas filled pro-comp shocks these made the handling better on road and gave even more axel travel off road.