REW hasn't been updated since 2000.
So nothing has changed since then.
There are better emulators now, but I remember that one being OK.
But if you prefer it or like it, then use it.
I like FCE Ultra the best.
Never really have to configure anything for that one either, other than the gamepad settings.
Has speed up/speed down which comes in handy, and it can load any rom regardless of what's in that rom's header (a few NES emu's won't play roms that don't have proper headers)