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

Input:
I received the unit and unboxed it,(Version 4.1).Setting it up is easy(it comes with a install disc that is idiot proof,however it wouldn't finished the set up. I called the tech support and after about three hours they decided that it was defective and that i would have to take it back to where i purchased it. Amazon made it right. I have since purchased a westell unit and it works perfectly.

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