Product review (4 stars): Works great!
I ordered this unit because of it's advertised high capacity air handling properties and the price.  Although having to wait a couple months for delivery after ordering this unit, I believe wait was worth it.  During the wait period Amazon was excellent in communicating with me about my order without prompting from me.  The hood was packaged extremely well with what appeared to me to be expensive soft foam packing on the inside and high density cardboard supports to protect the outside of the box.  I was pleased to see that there was not a stray mark, dent, or any other imperfection anywhere on the unit.  We done Z Line!!!

Product Summary:  This thing really moves the air.  I very much appreciate the fact that the two large fans do a good job of removing steam and smoke from the front burners of the stove which is a huge improvement over my previous hood. The robust air handling does come at a cost however - I find the unit more noisy than expected.  My kitchen is part of a combined dining and living space.  Consequently, the hood fans create enough noise to mask low volume music and normal voice conversation in the room.  If my kitchen was separated from the rest of the areas, I don't think I would mind the noise.  Installation was not that hard but was complicated by the fact I had to fabricate wooden mounting rails under the cabinet to accommodate mounting screw holes on the hood.  I was very pleased that the supplied rectangular ceiling vent hardware was compatible with my existing vent so this eliminated the need to purchase more vent hardware and reduced installation time. Installation required a second person to assist.  The hood performs very well so I do recommend this product to others.

Here are a few observations about the Z Line stove hood.
I like the:
  *  Fit and finish of the hood.  All parts are manufactured to close tolerances so you don't see gaps in the seams.  The stainless steel is beautiful and feels like industrial quality.  It is thick enough to tolerate moderate pressure when cleaning without denting or creasing.
  *  Two halogen lights. The lights provide bright and even illumination on and around the stove top.
  *  Controls.  The controls are simple with three fan speed buttons and one button that controls the lighting.
  *  Dimensions.  The unit fit perfectly in my 30" wide space and is thinner than my previous hood giving us more height in the cooking area over the stove.
  *  Appearance.  It just looks great in our kitchen and complements the other appliances.  There is no brand logo on the unit to conflict with brand badges on your other appliances.
  *  Performance.  As mentioned above the hood sucks gases from the front burners of the electric stove top and does so very well at a height of 25 inches.

I did not like the:
  *Cryptic Instructions.  I realize this is a tough area for all manufacturers but as a weekend warrior DIY guy I need lots of pictures and instructions. The instruction book left a lot to be desired for me. Others with more skills might find installation goes easier.  The instructions might help the less skilled user more if there were more step by step details included.  Schematics in the instructions need to be updated as mounting screw location measurements in the instructions were not consistent with the mounting hole measurements on the unit that was shipped to me.  While planning your installation I recommend that you do your own measurements to confirm.
  *  Lack of lighting options. This is admittedly nitpicking but you only get an on/off light button with the unit.  There is no high/low light setting available. That said, the 20W halogen bulbs provide a satisfactory level of light intensity.
  *  Fan noise.  I wish the unit was quieter but I'll settle for the high capacity air extraction as a compromise.

All in all, I am very pleased with Amazon's service and the high quality product I received.  I hope this helps future buyers as well as Z Line as they consider future improvements in their products.