Yes, I've been listening every chance i get. I have a McCormack DNA- 500 solid state amp, and wanted a taste of the tube sound, so far considering burn in time it is blending very well, i recently installed 4 Herbie Peek Dampers seemed to improve overall. The sound i am getting is Musical and Lively with nice texture, i continue to be play and play! Doubtful of 30 Day offer, and likely to upgrade tubes you know how that goes!