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

Input:
This product works very well.  It is VERY sturdy, the gauge and pressure valve work accurately and seems to be a safe product.  We are very pleased with our investment and from all indications, it should last a very long time.

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