So, I’ve been putting it to good use lately.
I made the large arch on the right, but after a quick ‘tutorial’ alien swiftly made the small arch in the middle of the pic and we joined our rivers together.
This is essentially a showcase for the capabilities of the tool. I also made the fighting snakes on the left, which was a lot of fun! So thanks again to Silarn for getting us VoxelSniper and if anyone else wants to learn the basics, I can teach you! 
Expect more to come.