I suspect this really is the best batch feed disposer on the market. It is stunningly quiet, seems solid and heavy, chews up everything, and my wife is pleased. The installation directions are excellent but there are a couple of steps that are tricky: getting the snap ring onto the sink flange, getting the spring type hose clamp securely onto the discharge tube was a bit challenging, and despite being warned about it raising and mounting the disposer onto the mounting tabs took two people because the disposer is so danged heavy.