As a fan of the NFL & seeing how their reviews are done, there 3 outcomes by the video review. The referees decision is confirm, overturned or the call stands, meaning there is inconclusive evidence to confirm or overturn the decision & therefore goes to the onfield decision by the refs. The NRL has adopted a similar system to the NFL's.
In the case of Fainu's try, the onfield decision was no try & there was no clear proof of the ball touching the ground. You can't ruled on speculation & say "surely he got that down". It has to be clear proof.
In the case of Canberra's try, the ref's onfield decision was try, and there was no evidence to say it was held up or confirm that it touched the ground, so the review went with the onfield decision of try.
Me personally, I was happy with both reviews.
Now, in saying that, the NRL bunker overall is very inconsistent & decisions made are subjective from 1 ref to another.