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

Input:
I bought my first patton fan in 1981 and have since bought several for my  own use and for my children.  It greatly increases the efficiency of my air  condition and we occasionaly use it with the heating system in the winter.  It is almost never turned off in the summer months.  On cool nights we sit  it in an open window and draw cool air through out the house. I almost  never run it on high......Medium is fine.

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