Dont know about the review, but i thought l would be in trouble with no more 505T available.
I have 2 of the 505t and now one of the 503t, the 503T is about a foot sooner than the 505, it has more flare, otherwise, they are very similar in motion.
the 500 series is a proven series from Track and it can easily be your benchmark piece.
Its a great ball for medium to medium/heavy patterns depending on layout, surface
I would not hesitate to recommend this ball to anyone, its that good