Sorry, I don't have much knowledge about tablet chips so this is all new to me. I might get an aPad which everyone knows has a telechip so I hope this chip is good.
in my experience the performance ratio is a bit like this: VT/WM 8505 < Rockchip 2808 < Telechips 8902 < ZT-180 < Cortex A8 core processors.
It has a very good video performance but could use a bit more edge in processing power and 3D performance.
In my eyes it has the best price/power ratio in a entry level device at the moment.