Not sure if you are a fan...if you are a fan, it is worth to go.Otherwise, it is at KINTEX 2 now, quite remote as compared to DDP back in Aug 2014.
Maybe you can consider to join the bus tour, which include pick up and admission ticket, but they will give you about 1 hr or so to walk around the exhibition area. 1 hr is enough including buying souvenir.
The exhibition area is small, but if you want to take decent photos (to escape from the crowds), then it might take time. There was photo package too (if you want to take photos by professional photographers at certain spots). I saw some ladies bought the photo package.