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

Input:
I use the timer function to remind me to check my blood sugar 2 hours after eating. I simply hang the time/clock around my neck before I eat and I start timer as soon as I finish eating.

This is a quality device!

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