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

Input:
I bought couple of these juicers.  It works great.  Very easy to clean. I have tried more expensive ones but nothing works like this one.  Amazon customer service also great.  They refunded the price different immediately when I notified them.

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