I ignored adjustable dumbbells for far too long. After trying a leading brand some years ago, I had an extreme hatred for adjustables. But, after pricing dumbbells, rack and shipping; I had to give adjustables another chance. PowerBlock is 100% the only way to go!!! I have the 90 Elite with Knurled handle. Dude, so perfect! Not just saying this, I actually prefer them to traditional dumbbells. Super sets are much easier with PowerBlocks. And one other thing, everyone online says that there are quicker changing adjustable dumbbells on the market. Wrong! All others require you to return to the rack for adjustment. Not PowerBlocks. I carry the entire stack to where I am working and change load on the fly. Great product!