Anybody have both Herbie's Cone/Spike Pucks and isoacoustics gaia's

My Spatial Audio X5's sit on pieces of granite which sit on top of carpeting with a concrete floor under all of it. Am very happy with the performance I'm getting now but was thinking of getting some isoacoustic gaia's for my speakers because of all the positive feedback. Never heard of Herbie's audio products before I started in on my research of isoacoustics. I'm wondering if there spike pucks do the same thing as the gaia's do? There pricing is attractive. So I was hoping to hear from someone who may have had both and could give me there feedback.

Thanks, 
Steve