Zen
Those reviews are all over the place, but appear to be for either an FX 7.3 or maybe the 7300 (no "FX" designation) which are two very different bikes.

I posted it separately, and with a photo in the for sale section. With a 20" frame I'd be pretty sure it's too big for you. It's probably too big for me but it felt much better than the 17.5" frame.
Martha