I purchased this new from a certain online shopping site about two months ago. It has been customized with V1 switches from Punk Workshop, which addresses a flaw of the Pro KO. The actuation point is lower, making it very easy to use. All accessories are included and it's in like-new condition, so I believe you can use it comfortably. Operation has been confirmed. Please refrain from purchasing if you are concerned about minor imperfections, as this is a used item.