Famous for being one of the if not the most popular rubbers for beginner and intermediate players in Asia. Affordable price plus variety of sponge hardness and many types of rubbers in the fastarc series, p-1, g-1, c-1, s-1. Good for basically everything, and easy to play with. Can be used to build the good techniques before advancing to other more pro level rubbers (tenergy and dignics, for example)
For the price point, which i purchased mine at, $37, I can't really say what is bad about it, besides that it isn't the best at the outright power in forehand, and requires some effort in the stroke. It's like a semi between tensor and tacky rubbers, needing the effort in the stroke with it being slightly tacky and spinny, in conjunction where it requires a more European style of stroke, with a high throw angle unlike traditional Chinese tacky rubbers.
Also I've found it prone to chipping, so please put edge tape, and take care of it.