The advantage is (1) mixing easily (2) do not weigh "catalyst" and "resin" for mixing (3) not contain any bubbles for mixing (4) as a result, we do not need any specialist for mixing.
Dis-advantage: (1) unit cost for one subject become high. (2) Since the resin hardens is earlier than the previous, it requires the training for application. (3) Remain in the Tip resin is wasted - not the ecology. (4) no operation procedure. (5) MSDS is not sent with the kit. I requested it. If there is no MSDS, it is difficult to use the resin.