Product review (5 stars): Sleek. Quiet. Works! Watch the price, fluctuates greatly!
This is a very impressive purchase that we are very happy with. Ventless installation was a breeze once you determine the height you want it at. It looks really beautiful. Reasonably quiet operation. Low level is perfect, medium and high are still acceptable, given the job they are performing. Prior to this there was a microwave/fan over the cooktop and we didn't use the fan because it was so loud. Then the microwave died too. Very happy with the noise level and efficacy of this fan. Easy to keep clean with stainless wipes and glass cleaner. I don't like how the extension piece hangs from the bracket because it keeps it from resting flush against the wall behind the lower chimney piece. There should also be a way to attach the two pieces of chimney together so they look more like one.

Have not yet shopped for replacement filters. Fingers crossed they are easy to find. Surprised no one has posted what the big box stores carry that are compatible.

Update:
After 2 months, started having a very loud rattling sound when the fan was on. Took off the chimney and glass and found a thin piece of the round ducting had come loose and fell into the damper. The ducting is just cut to a size and it is round so take care that there are no small pieces from bad cuts (either yours or the manufacturers) that could snap off in the "wind" from the fan and end up causing a problem. Very happy that there wasn't a problem with the unit.

Overall, I would recommend and would buy again (hopefully will not need to). Beware, because I bought it at $300 and now it is $200 only a few months later!