How Good is Walker Extreme SST Contact Enhancer

I recently put the extreme SST on all my connections including power cords and tube pins. The effect for me was immediately noticable with more solid images, quieter background and increased dynamics. I have spent much more on things in the past that did not get me near the sound improvement I hear with this stuff.

For what it is worth I used Craig Pro Gold prior to using extreme SST and in my system there was really no comparison. I have not used the standard SST and cannot comment on that comparison. I am sure results will vary depending on the system but in my system the results are well worth the $150 investment.