Instruction: Carefully assess the user's review for any strong expressions of sentiment, either positive or negative. Based on your analysis, select the most fitting sentiment option from the provided list as output.

Input:
I am an avid yoga student.  After months of the cushion mat I decided to try the Manduka Pro Mat under the advisement of my instructor.  Incredible difference in my balance with this mat.  I am thrilled I purchased.

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