Hi Mclesh,
I don't mind at all.
So you'd be looking for a co-op which is basically this: one person has taken on the responsibility of a full 20book Net galley slot, and then they sell the slots they don't want to other authors. So usually you have 20 authors for 20 slots.
Each slot is $300 and it's good for 12 months, and you can switch the title you have in the slot. So when you split one slot with another author, you're just saying you'll pay $150 for 6 of the 12 months. You need to establish what months you want.
All you do is go in before the end of each month (log in) and set up the book page/information sheet. Then you email the administrator with a cover and eBook attached, and they add it to the page you created. Then you archive whatever title is presently occupying the slot, and activate the new title.
It's really simple - the hardest part is finding someone who wants to split a slot with you.
As for the good vs. bad: I heard netgalley reviewers were harsh, and I've found that to be true, but I really am not bothered by negative reviews. Also, the crossover of reviews to Amazon is pretty small. For me, as an example, not a single netgalley review has crossed over to Amazon. The crossover to Goodreads are quite high.
But for kid-lit, the biggest plus is the librarians. As long as you have the infrastructure in place before you dive in, you can get some pretty good orders/contacts that way. If you can sort out how the whole smashwords/overdrive connection works that would be another major score.
Good luck! Your book sounds fun. Looking forward to seeing it. If you want me to clarify anything, don't hesitate to ask.
Cheers