Isolation feet, love or hate if you have an ear for them. Congrats if you don't, you stop torturing yourself.
This is fine tuning similar to fine dining, you want spotless sound. Isolation comes in many size, shape, material and technology. My view is simple, never use one single material isolation I often it imposes strong character. Strong character is never a good thing. And such, mixing things up is a better option.
My system is revealing enough to tell me about the changes with various isolation feet. My system hates spikes. Wooded plinth always adds pseudo warmth aka smearing, dynamics are slightly compromised. Tempered glass introduces ringing, almost difficult to work around it unless a very warm sounding system. Acrylic plinth, yuck! Composite on the other hand, a mixed bag. Ball bearing isolation leans toward metal spike with the sound less tilted to the highs. Wood too, can make and break. I like hardwood. It has good damping.
