This mod adds a large amount of different kinds of trees and wood blocks. It really livens up the landscape. It's truly a LARGE number of trees. Each tree has a different growth pattern, so that each is a unique challenge to completely cut down and harvest. That can add a lot of challenge and depth to the game. Really a great mod, both aesthetically and in terms of balance.
However, the new wood blocks added by the mod can not be used to craft fences. A small annoyance, as you can still find stands of stock trees to harvest for your fences.
Be aware that these trees spawn in places that would otherwise be plains! Plains will become much more rare after installing this mod. If you require plains, perhaps this mod is not for you.