Product review (1 stars): Broken within 4 months
Looks good but functions poorly.  Purchased it in July, 2015, installed by contractor late August.  Barely 4 months later (I hardly used it, as I don't cook much), it suddenly gave out this high-pitched noise, non-stop,  like a smoke or carbon monoxide alarm.  Called customer service, diagnosed it as having a broken circuit board.  they can only send me a new part and I have to replace it myself--the diagram they emailed me, showing how to take it apart and where to locate the circuit board..., looks too complicated for me to do it myself.  Their warranty covers parts only, so  I'll  have to hire a handyman to fix it--imagine how much I'll end up paying for fixing this broken vent, barely 4 months old.  Not worth the trouble or the extra cost...  So disappointed!!!  Should have heeded the other negative reviews on broken parts