I don't really know what the ideal nay (middle-eastern cane flute) sound would be, this doesn't sound quite how I'd expect (more full and consistent tone) but it makes a usable, very breathy flute sound that seems quite convincingly 'real' in a mix if programmed with care. If for some reason you want a 1960s/70s style jazzy-film soundtrack flute, try this.
The scale corrector takes a little puzzling to figure out - a brief readme file would help here but otherwise lack of docs not a problem because there is nothing else to document. No other controls over the sound, which is a drawback, but the basic sound is good quality with no harsh freqencies.
A little heavier on CPU than you'd expect for such a simple instrument (~100MHz) but it's polyphonic so you'll never need more than one instance of it. For some reason I like the airbrush-accident GUI, small but it cheers up a grey VST desktop.
Now I've run out of useful things to say so this last sentence is just to get the review up to the minimum 1000 characters.