I have been using Sistrum products (101s and apprentice stands) since around 2007 under a variety of components subs, speakers, amps, dacs, etc) and they have a profound impact. I have even incorporated their technology into my audio room design. Sonic impressions under speakers: better image focus, bass, speed, and air.....in other words more real or live sounding. Value? Not pricey considering that they typically will double your speakers performance and use raw materials and a fabrication process that is expensive unlike much of the cheap chifi masquerading as hi end. It's a no-brainer. They have multiple price points available....give Robert at SS a call....