Glenn was done completely by hand (never again)
Other characters were tested in Mixamo, but still done by hand because it just wasn't there yet.
But I'd heard good things from Rigging buddies about AccurRig and decided to try it out for this project.
And, it's not bad. I needed to add some simple 'arms' to Giga Gaia, because the program didn't like the gap, but that was the only error I got. Assigning points was easy, and I liked that you could mask off points (like GG's lack of legs), so that the bones didn't get randomly assigned. Also, the weight painting on the fingers was soo clean and tight. I love it. That's my most hated part to do.
GG just needed a bit of cleanup in Maya, but I owe that to the oddness of the creature.