If you want something that is big and clunky, get the Sardo.
If you want something that is a little more realistic, get the Delta 13.
The Delta 13 racks 10 times better than the Sardo.
To use the Sardo you have to put marks on the table to know where to put the rack.
With the Delta 13, it is a regular rack that is guaranteed to rack the balls as tight as possible.
Of course, if the balls are not the same size or if there are divots in the rack area, no rack is going to help with that.
The Delta 13 is very easy to use since it is just like a regular rack.
It is also the official rack of the US Open too, not the Sardo.