first reaction..sounded a little better then my old ehx 6l6s, but was it worth the $$?...over an hour of straight playing later..WOW..the cleans have so much more warmth, body and depth, it's unreal....which in turn, makes my BB and Diamond J drive sound amaaaazing over the clean now..lead / rhythm 2 is much tighter, and you really can notice the harmonic content in these tubes (chords etc sound so rich)..i look forward to getting some more hours on em and see how they start to break in..so far, i highly recommend em.