[Pollard]

Also, I start in large containers, and only transplant once.

I'm getting away from the 72 cell trays for the same reason. I want to sow the seeds and when big enough, plant them out. I hate potting up. 18 to 50 cells per tray is fine. They actually make 128 cell trays. Insane.

[Omnivore-Dan]

I find less root bound and less shock when transplanted. Most of the time when the soil in the pots is kind of dry, the plant slips right out of the pot, no root damage. Easier, too and larger pots will hold more water and nutrients. Works for me.