Other Asian, Australian and South Pacific Frequent Flyer Programs - T'way Airlines review or seating policy

Dear all,

I am tempted to fly T'way airline new service from Taipei Sungshan to Seoul Gimpo Airport.

It is a two and half hours flight. The price is actually pretty cheap!

However I am curious about its seating policy.
Is there anyway I can purchase extra legroom seat?

They only have a Korean website (no English) and a Chinese website (limited information). I emailed their reservation office but received no response!

Any reviews on T'way airlines or information about its seating policy will be appreciated!

Thanks,
Carfield