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:
We have used these for years in our offices. We were able to eliminate 50 dedicated fax lines with this product. They work great and have saved us a lot of money.

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