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:
Been using this idem in our RV since 2009 and the average  life span has been 1 year.  We are Full Time RVers.

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