For starters, it’s very light for a 4x4. Also, the pieces fit perfectly, making the turns smooth with low resistance. These aspects make long stretches of practice not wear your hands down nearly as fast.
The magnets are perfect, not too weak and not too strong. Also, the inner magnets are slightly stronger making the 3x3 stage much more stable than most 4x4’s.
Some people might say that the strong inner magnets make slice moves difficult and I would agree, but the only time that you really need to do slice moves is for the PLL parody if you turn it right.
I would highly recommend this cube but I would not recommend getting a different version than the standard single track version.