ISO Pucks with Harbeth and Sklyan Stands

I don’t have experience with the Harbeth but I’m using the same stands with my Omega Super Alnico Monitors. Given the weight of the speakers, I picked the ISO-Puck Minis to use between the speakers and the stands and I’m happy with the results. Part of it could be due to the extra ~1" height increase but I think they helped a little bit with the bass/midbass texture. I thought they were worth the $100 outlay. By the way, I have my stands filled with rice and that also helped with the overall sound quality. If you have the speakers/stands on suspending wood floor, I suggest using the provided spikes but use something like Herbies cone/spike Puckies or Gliders, or something similar to decouple the unit from the floor. In my experience the combination of the ISO Pucks, mass loading of the stands, and decoupling from wood floor made a noticeable improvement in the sound quality. Your experience might be different given a different set of speakers.