I bought this to replace a 30+ year old GE Spacemaker. Thankfully, the previous holes in the wall matched up to the rear fan exhaust. Unfortunately, that was the only thing that went smoothly with the installation. Skip down to the pros/cons section if you don't want to read my long tirade!
First of all, I should be clear that I have never installed a range hood before. Honestly, the product packaging made it seem like the FIT system made installation a simple three step process (hang brackets, align hood onto brackets, secure brackets) . There were no installation instructions included with the unit. I quickly found if you were to follow just the steps listed on the box, your hood would be dangling at the front!
I was able to find a manual on Whirlpool's web site (http://www.whirlpool.com/digitalassets/UXT5230BDS/Installation%20Instruction_EN.pdf) which went into more detail. I did run into some more problems with installation- namely I was having trouble removing the steel punchout for the wiring - it seemed to not be perforated like the other punchouts (like I said, I've never done this before). I contacted Whirlpool's support line and explained my problem. They told me to contact a professional and disconnected. Ugh. Anyway, I eventually was able to remove the punchout although in doing so I damaged the top of the hood (not a huge deal I guess, since it no one will see it anyway).
I had to bring in another person to help me mount the hood to the wall. On my first attempt, I didn't hold the hood up enough when I was fiddling with a screw- the hood drooped in the front which bent the rear supporting FIT brackets.
Now all that is over, the hood works great. The halogen lights are very bright and are great for illuminating my stovetop. The exhaust fan has three settings - at the lowest setting it is fairly quiet. At the highest setting, it is much louder- not overly loud, but loud enough that you would need to raise your voice a little to talk over it. But it moves a LOT of air! It really does the trick for flushing out cooking smells you don't want lingering (like sauteeing onions!).
Very sleek in appearance
Lack of installation instructions
Need to purchase a power cord separately if you aren't direct wiring
If you're an idiot like I apparently am, contact a professional for installation.