Product review (1 stars): Installation Woes compounded by Product Shortcomings
I originally chose this item because of it's low cost compared to the alternatives.  It's modern design style with the curved glass hood was also a motivating factor.  In fairness, I did read most of the negative reviews before purchasing and should have been prepared for some of the issues I found once the product was in my possession. For those of you still sitting on the fence re purchasing this stove vent - here are the reasons you may want to look elsewhere:

1. The installation directions are wholly inadequate.  Several other reviewers have mentioned this.  It is not a minor deal. Fortunately for me, I had a qualified contractor available to solve the mystery of how to properly mount the vent but it cost me extra time and money while he struggled to cope with the terrible installation instructions.

2.  Some of the interior edges of the exposed sheet metal are razor sharp.  We learned this the hard way when my contractor gashed his hand while trying to lift the unit out of it's packaging.  There was NO WARNING on the box alerting to this danger - and there should have been.  Nothing slows down a job quite as fast as an unexpected and unwarranted injury.  Not to mention the unnecessary suffering such an injury induces.

3. We found extra parts in the box that had nothing to do with the installation.  I counted nearly fifty superfluous small screws that had been included in the shipping box with absolutely no corresponding place on the vent to attach them.  For a lay person trying to plow through the confusing instructions this extra hardware without a home  simply adds insult to injury.

4.  The fan is not only obnoxiously loud it is unnecessarily so for a unit that alleges to retail for over nine hundred dollars.  Even at a reduced price of under four hundred the included fan should be far quieter.  The fact that it isn't is a testament to the corner cutting that went into the design of the vent.  In addition, the fan is not well balanced inside the sheet metal sleeve - the sheet metal shakes and rattles when the fan is run on high. There is no excuse for this given the unit's price.

5. The four LED lights intended to illuminate the stove top cooking surface are an absolute joke.  They are DIM and I mean DIM.  Barely night light strong. In fact, that is how we are using them now as a kitchen nightlight.  They are wholly inadequate to properly light up the stove top while cooking.  Keep in mind that the stove vent itself overshadows the stove and acts as an obstacle to prevent any other light coming from overhead from properly illuminating that surface. So the fact that the LED's aren't adequate to the task is no small deal.  Here again the manufacturer apparently cut corners and installed the cheapest, weakest LED lights they could find in order to maximize profits.  The cost of LED lighting has been falling in the past couple of years.  Providing LED lights with sufficient lumens without unduly increasing the cost to the customer should be included in the bargain.  I would have gladly paid a little more for brighter lights - as would most consumers.  Being stuck with these dim ones with no recourse to replace them leaves me with an unresolved issue that really shouldn't be an issue at all.

6. The unit makes a shrill, high pitched, beeping noise every time you press a button on the control screen. That gets old after the first couple of times you hear it shriek.  I don't know who thought this was a good idea back at the factory but let me tell you it has all the endearing qualities of the obnoxious beeping noise your car makes when prompting you to put on your seat belt.  This noise is MUCH louder! It is NOT a noise that you need or want to hear every time you press a button on the control screen which you are going to have to do thousands of times over the life of this vent.

7. Last but not least, buying something like this item requires a commitment in time and money.  First, you spend the money to purchase it and have it shipped.  Second, unless you are a masterful individual who can surmount issues like horribly inadequate installation instructions you're going to have to pay to hire someone to install it for you - and pay extra because it's going to take them extra time to plow through the obtuse directions in order to get the unit installed. Thirdly, once it is installed, you will be (like me) faced with the issue of sunk costs in both time and money should you wish to return the item for a refund.  For example, if I were to act on my dissatisfaction with the unit at this time and choose to return it, I would have to pay to have it disassembled from it's ceiling mount then pay again to have another manufacturer's model installed.  Hence I am reconciled to living with this POS because I don't want to have my kitchen torn up any longer than it already has been.  I also do not want to pay the added cost of reinstalling a competing vent that may arrive with similar problems.

Altogether I am of the opinion that most appliances like this one are way overpriced for what they cost to manufacture.  It's a seller's market where end users often have no means to effectively cost compare or prior experience to know what to expect from the unit they're choosing to buy.  Once you've persevered and it's been installed it is often too late.  If unhappy with the purchase it remains a very difficult decision to reverse course and look elsewhere for something better.

These are my honest opinions based on the experience I've just gone through installing this stove vent.  They have little to do with how efficient the vent may be when used to evacuate stove gases.  That part of how this thing works remains to be seen as my kitchen remodel is still a work in progress.  I can only hope that when all is said and done it actually functions effectively to do what it was designed to do.  I just wish I felt better about all the needless problems that have cropped up during and immediately following the installation.

Hope this helps.