I hate unlimited rebuy tournaments, people tend to play junk and go nuts with 2nd or 3rd pair because their
bankroll allows them to make well unlimited rebuys. The logic behind, I get more chips as possible because my rebuys are added to the prize and I will eventually make it to the ATM so, to hell with it.
Personally I stopped playing unlimited rebuy tournaments, I prefer MTT with a second entry and without addons, or one addon with less than 10BB. Except in extreme cases where Im down to less than 20BB, I rather not acquire an addon, because I trust my strategy and I consider it as a waste of good money.