Rebuy MTT

In Rebuy MTT, should we always rebuy ? And should we always add-on ?
If you won't rebuy, play freezeouts. You must take the right attitude towards R&A MTTs, and that means being willing to rebuy some times if you are playing well and just getting unlucky.
BUT, rebuys should not be always taken. An unskilled player should not rebuy. He doubles his buy-in but does not double his chances of finishing ITM (in the money). On the other hand, the more skill a player has, the more often he should rebuy. The more chips the player has accumulated the less often he should add-on.
Always rebuying and adding on can be a mistake. Most of the time, rebuying and adding on is a good move for the skilled, well bankrolled player.
That's only my opinion, of course....