Rumino Sato - how good was he?

[Bluesbreaker]

Rumina Sato was great, but his kill or be killed style did give him some defensive lapses. That being said, as others pointed out, he did submit BJJ black belts with regularity, and has probably the greatest submission in MMA of all time.

I agree. He was an incredible grappler/submission artist. His record would look better if he fought more carefully, but if he had, he might not be the legend we consider him to be.