Product review (3 stars): Mfr Refuses to Homor Warranty... Excellent Quality, But a Pain to Install...
Update at 20 months - My hood recently developed the flickering LED light issue that other reviewers have reported.  I checked the Xtreme website and confirmed the two year replacement warranty on parts.  I contacted the manufacturer and described the problem; I was prepared to send the invoice documenting less than two years from purchase.  Incredibly, THE MANUFACTURER REFUSED TO HONOR THE PARTS WARRANTY, saying that "technically" the lights weren't included in the warranty.  I invite everyone to view the warranty from the company website, which says nothing about an exclusion for the lights.

Original post - I settled on UL10-U30, based in part on the reviews here, after an extensive web search.  I wanted something that would MOVE air, not just make noises with little effect like the cheap Nutones and Broans.  I also didn't want high tech touch pad and computer chip controls, that in my experience are prone to failure, to control something that is basically just a couple of fan motors.  The electro-mechanical controls on this unit are excellent.

Pros
* Made in USA!  :-D
* High quality materials and construction. The stainless steel still had adhesive coverings installed on many parts to ensure no dings or marks prior to arrival.
* Excellent shipping packaging. Well padded and extensive use of Styrofoam throughout.  Arrived scratch-free.
* No issues on operating properly right out of the box. No assembly required, just mount and go.
* The unit is quiet (as range hoods go). Much quieter than typical hoods.
* It really moves some air!  On high you can suck all your heat or A/C out of the house in just a few minutes!  :-/

Cons
* A PITA to install.  The top sheet metal panel has keyhole slots so that mounting screws can be predrilled and then the unit hung using the keyhole slots.  Theoretically, the unit can then hang while the mounting screws are tightened at leisure (more or less).  However, THE HEADS OF THE SUPPLIED SCREWS ARE LARGER THAN THE KEYHOLE SLOTS THEY'RE SUPPOSED TO FIT THROUGH!  Picture a couple of grown men lifting a heavy unit and attempting to center the screw heads in the slots, but the screws refuse to pass through the holes!  You can image the dialog... How is that an AMERICAN designed product, manufactured in AMERICA, using AMERICAN made parts can come out with screw heads that won't pass through mounting keyholes???

* The LED lights are "welding arc" daylight white temperature; I would guess 5000K or more.  They create a substantial amount of glare off of reflective surfaces.  A better color would be about 3000K or so, more of a soft white color.  I will replace these as soon as I can find an acceptable substitute.

Note that the unit comes with a standard 120 VAC appliance plug for power, so you'll need to have a receptacle for it to plug into.

After getting past the installation SNAFU, I'm very pleased with my purchase and can confidently recommend it to anyone who wants more than a cheap homeowners quality range hood that makes noise, but little else.