I just picked up this training aid with a gift certificate I received and I must say that it seems to work well. I am not sure about the claim of getting any extra distance or anything but it definitely does help you get the swing on plane and release the club head. If you are a feel type player then you will like this aid. I have the 275 model and although it is heavy I found it to be easy enough to hit with. Its when you hit about 20 balls with it and then switch to the driver that you see the difference, kinda like the weighted baseball ring you put on a bat to warm up. I am not sure how it will help in the long run but just yesterday it seemed quite beneficial. I am hoping it will help me with my release which is the main flaw in my driver swing when I miss it.