I use it a lot and find it handy when you want to do a lot of quarrys at the same time and don't want to lag down your computer with to many animations. I did a 10 quarry setup and I'm still sorting through the chests that I have going. Of course I have a 140 mods to work from and changed a couple of config files to enhance the outcome.
Has anybody consider taking Tunneler"s Dream from the preset worlds, one of the Over-world mods and combining it with Big Dig to make an extreme Big Dig or did I miss something in the program that would allow it to be done. I think that it would push it to the limit.