It ain't for prestige GB! Personally, I like the way these things brings growers together. Like a way to make friends with people that have similar drives and interests. Then there's the challenge of it and the fun of sharing the experience and seeing how others deal with their issues.
There can be a definite benefit for nooby-ish organic growers. The 3oz organic grow is like a condensed learning experience. The soil is empty after a month or so, and then it's all you and what you give her. You start to learn what works well for what defs. and what doesn't, how long some things take to kick in, how long they last, and shit like that. It's not like I documented that stuff - it just kinda helps you hone your gut instincts.
Why not just give it a shot? Get some spare seed, pop it directly in the soil in a 3oz cup and stick it under a full-time CFL somewhere out of the way. Just keep it watered, give it a few weeks, and see if the fun don't grab ya.