first off - get some adjustable dumbbell . they be well worth the investment . these PowerBlock adjustable dumbbell be the only adjustable dumbbell I have use or own , and I love they . they be incredibly easy to use and adjust - it only take a couple seconds per dumbbell . even when my arm be dead tired , I can still guide they back into place easily and change the weight - something that might not work quite so well on other dumbbell . the size of the dumbbell be decent . they be bigger than standard dumbbell , but they have not hinder any of my exercise . I do many different exercise and so far these have not cause any issue for any of they . I think it might become more of a issue with a set that go higher than 45 as the dumbbell would get even longer as more weight be add base on the design . the only problem I have have with these be a very slight one - sometimes the weight below what be select stick . that be , you may set it to 15lb , but the next weight below it may be `` stick '' to it on one side or the other for some reason when you go to lift it out - you just have to wiggle it a bit and\/or hold down the weight that be not suppose to be come up as you lift the dumbbell initially . this do not happen often , and it be such a slight issue that it be hardly worth mention . I believe PowerBlock also recently -lrb- at the time of this review -rrb- come out with some that be very similar to this although slightly curve on the edge . I think those might look a little better cosmetically , as these be just square block . nevertheless , these work perfectly and still do not look too bad either . overall , get some adjustable weight . this be a great set , but if you choose not to get this set , at least get some set -lrb- with good review , of course -rrb- - adjustable dumbbell be just so much easier and more affordable - especially if you do not have a huge exercise room where you can line all the weight up -lrb- if this be the case , and you have lot of money , perhaps just get standard weight to avoid the slight time it take to adjust they -rrb-