I have own the PowerBlock for about 3 year now and I must say I be very happy with it . I buy it because I be start to run out of space and my room be look like a mess as I buy more and more conventional dumbbell . it work very well for almost every exercise : Dumbbell raise , seat press , one-hand row , incline press , curl , overhead press , etc. . the only down side be I can not do a behind the head curl with it due to it be square shape . for this I keep one conventional dumbbell around since it be easier to grip with two hand at once in that position . the other minor complaint be the pin use to select the weight be a bit hard to insert if the block be not perfectly flat , such as when it be sit on a carpet . overall , I be still very happy and consider it well worth the price when you consider how much it replace .