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

Input:
Perfect knife, I am a law enforcement officer and I use this as my boot knife/backup close range weapon and I gotta say it's very well made and sturdy. I wear the knife on the inside of my boot and the sheath sits right behind my ankle and I don't feel it while running and it doesn't rub, I wear the nike boots and the sheath stays in place with minimal movement when I pull on the blade. It stays in place all day and secured. The blade itself is extremely sharp which is what I want because this is not an all purpose blade let's face it, it's a double edge blade meant to stab and slice ! So I don't use it for anything for when the time comes I know it's sharp and ready (I coated the blade with a bit of gun oil) . Overall this is the nicest blade I've bought in a long time!

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