Customer Rating: Summary: Perfect weight, easy to hold Comment: I have used small dumbells for workouts they are hard and cumbersome. These weighted balls work wonderful for jazzercize routine and/or pilates. Customer Rating: Summary: Fun & Easy Way To Get Your Arms In Shape Comment: I spend a lot of time in front of the computer doing this & that and I'll just grab this up every so often and toss it back between my hands or do the exercises that come in the box. I've had this a little over a week and I can definitely tell it's working already. It's weighted just right and it doesn't even feel like I'm actually exercising at all which makes it more fun.