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:
The trackman has been my favorite of all mice since I started using it. The only drawback-that can't be avoided-is that the trackball sensors get dirty after while and you need to disassemble it to clean the sensors. But then it's as good as new. It's the only mouse I'll ever use. Since your keeping your wrist in one position, it's great for reducing carpel tunel syndrome.

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