Sound Application line conditioner experience?

Based on Brent Rainwater's (Rainwateraudio.com) enthusiastic recommendation, I bought one of Sound Application's Reference Line Stages and two of their newer RLSs. They significantly lowered the noise floor in my three dedicated AC lines and transformed the sonic landscape, top to bottom, of my audio system for the better. Tons of AC contaminations were removed. It was a sonic revelation. I'm very happy with the enhancement.

I did have an earlier model (plain X,I think) Sold that puppy,pronto.(( It did retail for 4300,but I never understood why.)) I moved on to the Adept Response and am still happy after 2 years.

I owned the original Hydra and recently tried the PS Audio Power Plant Premier but the SA XE-12 bested them by quite a large margin: more liquidity, more natural tone colors (not as dry as with the PS Power Plant) and I can no longer hear a slight hiss that I had in my system with the Hydra. I'm using it with MAC Wire Delta PC which I like better than the Elrod EPS 3 Sig.

Thanks for all the comments so far. It's interesting that there is no concensus as far as these devices go. It appears to be somewhat system dependent. I put the running springs conditioner on my old front end and at the time it was nothing short of amazing. Probably the single biggest leap in system performance I have had. Now that I have better everything (preamp, amp,cables, dedicated lines) the running springs ruins the soundstaging. There are still some elements of the sound that are better with it in place, but in general, it is better without it now. There are other line conditioner manufacturers out there, but one rarely hears much banter about them with the exception of Shunyata, which I found to not perform as well as the running springs in my system. I have seen a burmeister, nordost, accuphase, etc. Anyone try these? More thoughts on the sound application welcome as I have ordered one to demo. BTW the price has gone up on these things. It better be great!