I needed to ease up my swing. This training device provided me with that possibility. It also trained me to create a greater lag in my swing which translates in a longer more accurate shot. Due to its weight, it will for sure help develop my golf muscles. I have used it for only 10 days and I do expect to gain 15 to 20 yards on my drives soon. It is great for warming up just before driving on the first tee. It is also very good to swing from both sides, making sure that we don't develop our golf muscles only on one side and for providing more flexibility.