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

Input:
Returning item due to the difficulty of assembly.  It is extremely hard and over 2 hours I still can't get them connected.  Even the included instructions are written for assistance of two additional individuals.  Disappointed because I gave it the benefit of the doubt when others talked about the assembly process but others said they had no problem.  I don't know how they assembled it so easy.  I was really looking forward to using this as a cool workout.

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