I struggled with the decision as well. Lots of information either way on handling. I placed value on the lifetime warranty and the stainless steel construction. I tend to keep cars a long time, so the cost of wearing out ISC's vs. an inexpensive KW rebuild (or even free based on the warranty).

I was on the fence regarding the SLS delete option, but Evan's comments swayed me to keep it, even though the cost of a compressor, at the least, is probably in the future of an aging car.

I'll PM you the info on the reseller I purchased from.

 

I struggled with the decision as well. There seems to be a lot of information either way on the handling…I chose to interpret the information such that I would be able to gain handling (specifically looking to subdue body roll) without sacrificing most of the stock plush ride quality.
I placed value on the lifetime warranty and stainless steel construction. I tend to keep cars a long time, so the cost of wearing out the ISC’s vs. an inexpensive rebuild of the KW’s (or even free given the warranty) was a deciding factor.
The SLS delete was another factor, in the end Evan’s comments helped me to decide to keep it, even though a compressor is probably in the future of an aging car.
I purchased them last week from Golan at Autotalent (310) 231-7800 in LA. (adding .com to the preceding yields his email) I PM’d you more info.