Instruction: Given the user's review, identify the user's sentiment from the listed options. Answer using one of the options.

Input:
It sort of works, however it is not structurally sound enough to actually hold a water bladder for the shower.  It just bends and crumbles under the weight.

Options:
A: very positive
B: positive
C: neutral
D: negative
E: very negative
Answer: D: negative