Product review (2 stars): FATAL FLAW
First, I give the unit two stars because it works and it pulls a lot of air. It has worked for us since 2009 and only recently the light bulbs failed.

However, the bulbs were very, very difficult to change.  Apparently, the designers were not concerned with maintainability.  When the lights go out, good luck changing them.  The lights are very, very difficult to remove. It is impossible to get a good grip on the bulbs with a bare hand because the bulbs are smooth.  The help line recommended that we use some material that could give us a good grip.  The company should ship a tool with the unit to make removing the bulbs easier.  I used a large rubber band and that gave me a little bit of a grip.  The bulbs were stuck very tight.  Together with the odd angle at which I was forced to grab each bulb from below, I was barely able to put enough torque on the bulbs.

Furthermore, the unit sounds like an aircraft engine.