octane booster

octane booster eliminates the common problem of jerking in maximas, while idling, in gear e.t.c.

Is this true?

Are there any dowfalls to consider using octane booster every tank fill up/using it once in a while?

If your really concerned about octane levels, just buy 92 octane gas. Octane boosters are best for older or really high performance cars that used to run on sludge leaded gas. The max does not require an octane booster, nor IMHO, need one. Save your $$$ Just my $.02 :D