It's amazing how much PolyMakr's PolyWood™ looks like wood, considering that it contains none! Unique among 3D printer materials, it doesn't contain wood particles; rather, its organic look and feel result from an internal foam structure. PolyWood is very easy to print with - doesn't have any jamming/clogging tendencies, sticks extremely well to any bed with the help of glue stick, doesn't warp, and doesn't require a heated bed. Its foam structure tends to hide layer lines, and removal of support material does not leave discoloration as it does with ABS. Its one drawback is that it's not especially strong. Not that it's super-fragile or too weak for most prints, but thin structures operating under stress are likely to fail.