I've used various Nady mics. Here's my rundown.
Model: Nady DM-90
Genre: Kick drum (dynamic)
Comments: Dull, lifeless sound. Really unimpressed.
Model: Nady CM-90
Genre: Pencil SDC (FET)
Comments: Fairly neutral, not a lot of noise, a little brittle sounding, work fairly well for drum overheads.
Model: RSM-2
Genre: Ribbon (dynamic)
Comments: I like. Nice, open sound (though I'm told it's a bit more open if you remove some of the foam). Works very well for tenor voice and instruments. A little harsh on trumpet.
But no, I've never tried any of their tube mics.