Everyone to their own I guess, but I thought the octaver was killer! Aside from the tracking, which was spot on, I loved it's growly timbre. I think it might be the only time I've seen an audience specifically react to me using an effect pedal (in a good way, I think).
On an slightly unrelated note, I always used a solo'd sub octave before my SS (when I still had it), which seemed to really make it sing.