messy and frustrating , but very pleasing at its best moments 
(ROOT (ADJP (ADJP (JJ messy) (CC and) (JJ frustrating)) (, ,) (CC but) (ADJP (RB very) (JJ pleasing)) (PP (IN at) (NP (PRP$ its) (JJS best) (NNS moments)))))
(ROOT (ADJP (ADJP (JJ ) (CC ) (JJ )) (, ) (CC ) (ADJP (RB ) (JJ )) (PP (IN ) (NP (PRP$ ) (JJS ) (NNS )))))