I am on the page to buy a new one, because apparently XT-60 connetors can be plugged in backwards, and doing so totally destroyed my GOKU506S. No ESC music, all motor leads test positive continuity to the positive battery connector. Yeah. Lovely. No diode protection to the battery connector at all.
So whenever you plug your battery pack into your quad, you better make extra sure the square side of the male XT-60 is to square side of the female XT-60... or big spark, black soot, and no more ESC and it looks like, one serious headache soldering job to have to try to replace... esp. for me... though I can solder fairly well, I am visually impaired with no depth perception and poor vision.