Product review (4 stars): Hear the fan noise - See the lights brightness video
<div id="video-block-R3OM3CO5WDB3CK" class="a-section a-spacing-small a-spacing-top-mini video-block"></div><input type="hidden" name="" value="https://images-na.ssl-images-amazon.com/images/I/C195AavirFS.mp4" class="video-url"><input type="hidden" name="" value="https://images-na.ssl-images-amazon.com/images/I/81aCUUZzHAS.png" class="video-slate-img-url">&nbsp;I think this unit is a great value if you are going ductless. I included a video to see the brightness of the lights and hear the fan noise level. The lighting level is amazing for cooking and the noise level is acceptable although it would have been nice to been a little quieter but certainly not a deal breaker and would still highly recommend.  I would caution you if you installing a duct because the design of the chimney and vent connection doesn't accommodate adequately for this type of installation so I ended up needing to small piece of wood as a simple bracket. Not that big a deal to make a wooden bracket.

UPDATE: It turned out real nice after making up a custom little piece of wood to mount the bracket on and drilling a couple of holes in the extension piece. Actually it turned out even better looking because I flipped the extension upside down and hid the vent slots since I didn't need them with a duct installation so it looks real clean like one solid chimney piece now. I have photos to show how the chimney extension looks installed without the slots exposed. ;-)
UPDATE AFTER TWO YEARS: I can tell you that this has been absolutely flawless after over more than two years of use. No doubt I have been very pleased with this purchase for the kitchen remodel. I wish I could say the same for my dimmable LED recessed lights from Lowes which have all failed and been replaced under warranty in the last 12 months. :-D