Any experiences with Shunyata Research?

I would like to get more specifics from real SUN.R. power cable owners, especially those of the Black Mamba and others that do not go over 1k! Any differences when comparing them with competitors like Synergistic Research... Please be specific in the description of the music texture and what sort of amplification was used (I have a POWER 2 from SONIC FRONTIERS.) PAUL