The Pro Library is a large collection of over 120,00 parts from a range of manufacturers including: Actel, Analog Devices, Altera, Atmel, Fairchild, IR, LT, Maxim, Microchip, NatSemi, RFMicro, ST, TI, Tyco and Xilinx. This library contains Easy-PC components, corresponding symbols and footprints. Each Component has been created using the manufacturer's datasheet. Upgrades are available if you have the older Enhanced library or any previous versions of the Pro Library.
With the complexities of the Component data alone, this library can save you days of work on just one device! Given that you are eliminating potential mistakes creating the data yourself and the addition of the footprint definition of say a 164 pin BGA or a PLCC, then this library represents extremely good value for money.