Bests & Worsts Reviews from Amazon

I've been using this stone for months and have started to find that, while the fine side does provide a nice sharp edge, the 400gr side is wearing my knives unevenly, which causes me to be unable to finely sharpen the entire length of the blade when moving to the fine side. The logo that is put in the middle of the 400gr side of the knife is causing more material to be removed than the rest of the blade when I'm sweeping across. I even verified this by going straight down the length of the fine side and watching the wear pattern come from the material coming off of the knife onto the stone. Checking with a surface plate at home and at work I've also verified the edge is not staying straight and curves inward towards the spine before the tip starts, which is where my knife typically stops traveling over the logo. I'm likely just going to throw this stone away. It was nice at first, and I sharpened 20+ knives in my kitchen to a fantastic edge after getting it. But after consistently using it I've found this wear pattern in 3 knives using this stone to maintain them. This is unacceptable.