Instruction: Analyze the user's review text and determine the overall sentiment expressed, then choose the corresponding sentiment option from the provided list (A: very positive, B: positive, C: neutral, D: negative, E: very negative) based on the identified sentiment.

Input:
I immediately fell in love with this mouse the first time I used it.  The contours fit perfectly into your hand, whether being left or right-handed.
There are 4 programmable buttons, as well as the fifth button in the scroll wheel.  The scroll wheel can be programmed as well.
This mouse can be used with a USB or serial/ps2 connection.  The convenience, which should I choose?  USB of course, but for those of you who don't have a USB equipped computer, don't fret.
The optical mouse are superb these days, since they do not require a good surface to be used on.  Wheel mice are horrible now, how can I go back to a mouse with a dinky wheel?!
I have a desk with a crack in the center, which a wheeled mouse would studder as I roll it over the crack.  Not with this optical mouse, it doesn't even flinch when I roll it over the crack!
I highly recommend this mouse to anyone who is skeptical about an optical mouse.

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