I like the powerblock and they change fairly easy . sometimes you can get the pin crossway but it be not hard to correct . I also have the bowflex 52.5 lb . and think they be the best on the market . the question will be how much do you want to spend and how much weight do you need . this product work fine and I would recommend it but the bowflex dumbell be the best . this product be smaller and better for someone not need the extra weight of the bigger dumbell .