It just adds a little simple feature into the world of Minecraft: The chopping of a whole tree by just removing one single block. The time to cut the tree is the same as to cut a single log. It also has two ways of disabling it if u want to only remove single blocks. First one is to sneak, second one is to use the /lj [enable/disable] command.
How to install:
You should try another interesting cut down trees, excavator mods here: Cut Down Tree Mods
Download Links:
For Minecraft 1.8