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

Input:
I always used a sharpening stone for my blades which work fine but take practice and time to get a decent edge. I tried some similar sharpeners like this in the past but they simply did not leave a very sharp edge. After reading the reviews I decided to give this a try.  Wow, this is a very good sharpener.  It removes metal fairly quick.  I can sharpen my kitchen knifes in about 1/3 the time as using a stone and get the entire length of the blade evenly sharpened.  It has a hand guard that makes sharpening safe.  It leaves a micro saw tooth edge not razor edge which is great for cutting most foods.  If you want more of a polished razor edge you can finish up with a fine stone and leather strop but for most around the kitchen use its probably not nessesary.  This is truly a sharpener for dummies.  Anyone can get a sharp edge with this with minimal effort.  I have Wustoff, Victorinox, and some cheap Martha Stewart brand knife and it sharpens them all just as quickly and as sharp.  Where I've found the best use is for my camping blades.  It have a tramotina machete which gets banged up each outing trying to clear brush to pitch my tent and chopping fire wood.  This puts a sharp edge back on it quickly. It's small and light enough to keep in you pack if you plan to be out in the bush for long.  I've not tried it on an axe but have no doubts it would work excellent,  I also have a Kershaw camp 10 which has somewhat of a rounded blade which makes sharpening with a stone a little challenging.  This is perfect for odd shaped blades because all you have to do is maintain a 90 degree angle with the blade as you drag the sharpener against it. This thing is an amazing product and well worth the price.  My advice is apply light pressure when sharpening kitchen knifes to not take off too much metal.  For thick blades like machetes and axes you can get get more aggressive with sharpening.

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