[3] To run an optimal emulation, the program requires a minimum 800 MHz processor.

Its high requirement is due to its accurate emulation of the NES hardware.

The emulator will play most ROMs and has a strong port for the Apple Macintosh.

[3] Brandon Widdler of Digital Trends considers the emulator one of the best for the NES, though he admits that it has fewer features than its rival FCEUX.

Richard Bannister and R. Belmont later ported it to Mac OS X and Linux, respectively.