First, its large size makes many services with condition of having a work plan big enough to enjoy.
Then his many notches and pre-plotted points complement each other perfectly to provide many opportunities for tracing. It feels that these elements were thoughtful as they correspond to many frequent use DIY (reference angles, "System 32" for the interior fittings, etc.).
Finally, the subject holds well in hand and we are not afraid of breaking it by using it.
In summary, a well made product, making many services for a very reasonable price.