It is gimmicky, but it is fun and entertaining at the same time.
The rules are pretty simple.
1 person from each team facing off at a time.
Partner has to be between the two posts for their corner to get tagged in.
Can tag partner in at any time.
They have 3 seconds to "double team".
Once there is a tap they switch who is in.
At the end of the time the team with the most subs wins.
If its a draw, crowd votes.
Its usually fast paced and energetic since you can tag a fresher team mate in.