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I had these springs reset at a professional spring works and at their recommendation had an extra leaf added to each corner. This increased the suspension travel, but the ride was rough. I thought that the original was rough, but the new was really bad. I thought that it would soften, but after 3 months I'd had not. They had to go.
When I was looking, I had in mind that I would only lightly load the back of the vehicle for weekend trips. I didn't have much gear, and what I had was for bush walking. With this in mind, and having talked to the salesman, I purchased the medium setting kit (springs and shockers). The following week I had it installed at ARB HQ in Croydon. (A hugh and impressive place.)
At first the ride was a little stiff, but this softened up a bit. It was much better that the old reset springs. The ride was never limousine quality, but I'll never get this with such a heavy vehicle on leaf springs with such a short wheel base. Off road things were much different. With the old suspension, hitting a big bump or wash away would make a crashing sound and the vehicle would be air born. The same bumps and wash aways with the new suspension now didn't crash, just sort of rocked/flowed over with much more comfort and control.
Also, during these years the use of the vehicle has changed. Originally I was loading it only lightly, but over the years the amount of gear had increased a lot. I now load the rear up with enough gear for a two week trip, and have also added in a 90 litre fuel tank underneath, behind the rear axle. I had an extra leaf added about 2 years ago, but it still sags a bit too much when fully loaded. I should really get a new pair of heavier rear springs, but that's another story.
The shock absorbers are still OK for on the road, but off road they're getting a bit tired. In the high country the rear end is getting a bit soft, but this is probably a combination of the springs being over loaded, and the rear shocks getting a bit old. The front shocks are also getting old, and now fade when I have been travelling over rough unsealed roads at higher speed (80+ Km/h) for more that 30 minutes. I notice this mostly in the outback.
The vehicle now leans a bit to the drivers side (right), but this is in part due to this side carrying a greater load most if the time. (ie. the driver, and the battery.) It always had a bit of a lean from day 1, but was then within ARB's limits. If the load is even, then the vehicle sits flat.
Surprisingly, the springs haven't sagged much. At times it looks a bit lower that it was, but if I take all the junk out that I always seem to lug around, it sits back up near to original height.