For tourist, its more convenient to buy their EASYCARD to get around the different stations faster and with ease, its also applicable as payment for Bus Rides. The Adult Easycard cost NT500, containing NT400 usable amount and NT100 cash deposit which can be refunded upon return. This is very similar to Hong Kong's OCTOPUS Card.
Instead of retuning our EASYCARD, we decided to keep it as remembrance even if mine still has 106NT usable balance plus the 100NT deposit. I'll most probably be back in a year and this will surely come in handy.
I've created a small clip to feature our Metro Taipei experience.