This is a very good kettlebell alternative! I haven't noticed any issues at all. They feel good in the hand and the weight is very smooth and comfortable. I have to say, I ordered this product as they were the only ones that had an available gym weight, during the covid 19 related shortage. The reviews seemed good, so decided to give it a try and I bought it. I ordered 2 medium BullBells and upon arrival there was a tshirt in the box. I thought they made a mistake, and I didnt want to get charged for it. But when I emailed them they told me they do that for some customers sometimes. I thought it was very nice but also it didn't fit me so I'm giving it to my friend.