This arrived with the case damaged on all corners. The hammer had a crack where one of the screws was attached and the handle was broken. I taped the handle up to make it usable. The oil level was low but usable. I only needed to remove a small concrete wall and was not about to return this 50-pound behemoth. As for performance....the machine is a beast. It easily handled the concrete like it was playing. It has tons of power and the chisels are strong and solid. Directions are lacking on maintenance. I have nothing bad to say about this tool except shipping damage.