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

Input:
I think it was maybe 1999 when I first started using the MS Natural Elite keyboard, and it's literally all I've used since, for over 17 years.  I work in IT so I spend LOTS of hours at the computer.  I think I've gone through 3 or 4 of these keyboards, with the one I use now daily being maybe 10+ years old.  Only one keyboard failed on its own, the others have all failed due to me spilling coffee or soda in them. They're durable, and via a PS2 to USB connector I've used mine on Linux, Mac, and Windows.  When or if the one I have now fails I'll definitely be scouring the Internet for this same model.  You just can't go wrong.

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