Yup... No Rez is something special. I installed No Rez along the walls, front and back of my Kef q150s. I left the polyfill that it came with at the top of the cabinet. I was worried that removing it would negatively affect the perceived air space of the the box.
At first, I thought I lost some bass presence but after more listening I realized I actually had deeper, punchier bass when it was actually in the recording. So the reduction that I thought I heard was just the absence of box bloom. But the improvements that surprised me most was in the midrange and soundstage. It seems cleaning up the bass and resonances uncovered what I had been missing in the midrange. Just wow, better detail, more realistic tone and overall a more balanced presentation. And the soundstage widened and deepened noticeably on certain recordings. I could better pick up on spatial queues as the speakers practically disappeared.
So yeah, I am delighted. Adding No Rez was more of an improvement to my ears that just upgrading the parts quality. What a value! I am genuinely excited to do more listening.
Thank you, Danny and GR team!