Product review (4 stars): Inexpensive, Efficient, and Easy to Install
Well within the capability of an average do-it-yourselfer (especially one with a second pair of hands to hold the thing in place), this is versatile little unit.  It includes adapters for vented or non-vented installations.  Relatively quiet, moves a lot of air with its two speeds, has a light, and is very little more difficult to install than a new light fixture.  In fact, removing the old fixture took longer than installing the new one (not to mention the fact that the new one had considerably less yuck factor!).  Recommend reading the instructions all the way through before starting -- yes, husbands, this means YOU.