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

Input:
I bought this for general lubrication of scuba tools and fasteners on my scuba BCD. It was cheap and I think there's enough silicone to last a life time. Easy screw cap top. I usually am pretty satisfied with Trident items and I was with this product. However, I would not use this for my regulator and SPG as it's not oxygen certified lubricant.

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