Seconding this. Instead of hearing from bloggers or contributors, what is using this DB like in the trenches? What simple use case would fit this DB perfectly?

Seconding this. Instead of hearing from bloggers or contributors, what is using this DB like in the trenches? What simple use case would fit this DB perfectly? Is there a lot of setup on second/third deploy? Easy to maintain, or requires a lot of tweaking/tuning? How is memory usage with 10M records? 100M?