I bought the sub kit for my Iron Maiden and don't regret it one bit; it truly adds a ton to the machine. This was my first modding experience and the instructions and process was super clear and easy to do for a first timer. Dan at pinwoofer was super helpful answering my questions and replying to my emails very promptly. I'm super happy with the product and service he provided, can't recommend it enough and will definitely be my go-to for the next machines.