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

Input:
The Harbinger 340100 Durafoam Exercise Mat is a great Mat. I specifically use it for INSANITY floor workouts, and it has been great, soft on the knees and feet.  Although the product slips a little bit on carpet, for the price, you cannot beat it.  Thanks seller. You're doing a great job!

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