I have have these for a while now , and for the most part , I like they . they be a reasonable compromise between individual weight dumbbell and other , more expensive , adjustable weight . it be easy to select the desire weight and with a maximum of 24 pound per dumbell , you can get a good amount of resistance for most common dumbbell exercise . the minor complaint I have be that they could have a bit more room between the rod that connect the weight disc , as my knuckle can sometime rub against they unless I hold it in just a certain way , and also it be not always easy to get the weight selector `` thingie '' in the right place . other than that , a far less expensive option than Bowflex .