My favorite go-to sockets are a triple set of 3/8 drive Capri impact sockets which cover every metric size from 8mm to 22mm AND include shallow, medium, and deep sockets in each size. But finding a truly good holder to keep them all together was impossible until I found this one. And they all fit perfectly. So that's the big positive.The second big + is the holder came with 3 full sets of (good) labels, not pre-labeled, so it was easy to make the labeling actually match the socket sizes.The only improvement I'd like to see would be stronger magnets to hold the sockets. The magnet on the backside is plenty strong enough to place the full set vertically on the side of a toolbox or cabinet, but care must be taken that no sockets fall out.The only other improvement needed is a more competitive price since this is definitely not inexpensive.That said, I'm pleased with it enough to now spend 'too much money' again for the SAE triple socket set version.Unfortunately, this company's prices are beaten significantly by most competitors on regular 2-set (shallow & deep) socket holders, so I will buy those holders elsewhere to recoup the "too much $" these holders cost me.