my ac has upgrade to P2P 2month and i used HKG$207
2x$96(400point)
1x$15(50point)
I think using My Card is more expensive (service charge US$3.5 per month)but you can upgrade faster than Bank Transfer(take only5-30mins)
But the bad thing is you can't just go to 7-11 or OK and buy my card.The card sell in7-11/OK only for HK but when you store up(儲值) the my card to (http://www.mycard520.com.tw/) it need TaiWan My card.