Pros:
High attack, access to powerful stab moves, access to boosting moves such as curse or honeclaws, access to leech seed and willowisp(if youre going bulky), has usefull abilities such as natural cure or harvest, useful resistances and immunities
Cons:
Very slow, not exceptionally bulky, very common weaknesses
If this is for ingame, it might be a good addition to your team(though I think gourgeist supersize is much better)