Would the following phrase be considered positive or negative?

unrelentingly grim --

negative

Would the following phrase be considered positive or negative?

establishes a wonderfully creepy mood .

positive

Would the following phrase be considered positive or negative?

the performances of pacino , williams , and swank keep the viewer wide-awake all the way through .

positive

Would the following phrase be considered positive or negative?

sadly , full frontal plays like the work of a dilettante .
negative