I don't have any experience with the others, but I love my Strange adjustable rears. For crapps and giggles, when I first put them on I turned them all the way to the tightest position for the drive home....and I think I ruptured my kidney.
At the track they were great, my car always squatted too much on the pass side during my launch, I made a few test launches and adjusted them slightly, now my car squats evenly during hard launches, cutting 1.6 60'. I left them the way they are for daily driving, but I can always adjust them for better handling....but they feel great the way they are.
I recommend them. The only downfall I found was that there are really no markings on the knobs. You pretty much have to turn them all the way one direction, then count the clicks. Which really isn't a big deal, because it's not like you can really see the knobs when you are adjusting them with the car on the ground anyway.