quite simply , a joy to watch and -- especially -- to listen to 
(ROOT (FRAG (ADVP (RB quite) (RB simply)) (, ,) (NP (NP (NP (DT a) (NN joy)) (SBAR (S (VP (TO to) (VP (VB watch)))))) (CC and) (, --) (ADVP (RB especially)) (, --) (S (VP (TO to) (VP (VB listen) (PP (IN to))))))))
(ROOT (FRAG (ADVP (RB ) (RB )) (, ) (NP (NP (NP (DT ) (NN )) (SBAR (S (VP (TO ) (VP (VB )))))) (CC ) (, ) (ADVP (RB )) (, ) (S (VP (TO ) (VP (VB ) (PP (IN ))))))))