Product review (4 stars): Absolutely Awesome
Pro:
1) Variable speed control knob.  Feels great to set the speed/sound level to exactly what you want.
2) High and low dimmer switch.
3) on low speed it is VERY quiet.
4) comes with a backdraft damper.
5) for me, 440CFM is more than ill ever need.

Cons:
1) The dimmer switch doesn't support the GU10 LED bulbs on low setting.  There is a high frequency strobe effect on low which can be very annoying.  But at 6 watts per LED bulb, i don't mind leaving the bulbs on all night on high setting.  Dimmer is designed for 50 watt GU10 halogen bulbs (not included)

If not for the LED dimming situation i would rate this 5 stars.  LOVE IT.