Instruction: Assess the user's sentiment in the provided review and select the appropriate sentiment option from the list as the answer.

Input:
Learn from me and buy someone else's product because their customer service is horrible if you encounter any problems!
The company customer service representative informed me that they are undergoing an acquisition and cannot currently fill orders for their products.  I have been waiting for my carry case, which I ordered over 3 months ago, and still have not received it.  They told me on 4 occasions that the case was shipping the next day but I haven't gotten it.  Now, they tell me that it is on back order again (when the last time they told me they would overnight it the next day) and I will have to wait another month or more, and they refuse to allow me to cancel the order to obtain a refund of my money.
Oh yeah, if you're still crazy enough to consider buying this or any other Rio product, the player is of less than average quality, very poorly built, and very poor performing.  For example, the battery cover comes open with the slightest touch and although marketed as skip-free it does skip with even minor bumping when I am walking with it in my briefcase.
Do yourself a favor and buy another player!

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