Product review (5 stars): I'm very happy with it (I've had it about a year so ...
I'm very happy with it (I've had it about a year so far).  We used to have a downdraft vent - that was totally useless compared to this.  The 3 baffles are easy to clean - just put in dishwasher.  Be sure to take the baffles out carefully so that they don't fall down - make sure you put one hand (pressing up) right in the middle of the baffle when you take it down.  I usually one use the high speed while cooking and the low speed after.  This vent sucks out most of the cooking smells - the only way (that I can think of) to really get every cooking smell out of the kitchen would be to have a vent like this above the cooktop as well as another vent in the middle of the ceiling of the kitchen.  I'd definetely buy this again.