Has anyone tried Full Music 12ax7's?

After reading a thread from some guys in the UK http://wduk.worldomain.net/forum/showthread.php?t=4913 I decided to try some of these tubes. I don't have a large collection of 12ax7 types but a few.

Shuguang 12ax7
Electo Harmonic 12ax7
Tungsol New Stock gold pin 12ax7 ECC803s
Tungsol NOS 12ax7
General Electric 3 mica black plate 5751
Sylvania 3 mica black plate 5751

After putting a pair in the preamp position of my Jolida 502 integrated amp I was really happy with the sound. In fact I put all my other tubes in a box and haven't even thought of taking them out. Even my past favorite Sylvania's. I was just wondering if anyone else has tried them?