I ordered these Merrell Men's Moab fST Waterproof Hiking Shoes to replace a set of Keen hiking shoes that I had worn out.  The Keens are excellent shoes and very comfortable, but they tend to get extensive wear on the soles (particularly for me, the heels wear out within 9 mos).  This review is my initial impression and I will update if anything changes.
FIT:  The shoes fit as expected.  They seem a bit tighter than the Keen equivalent but are as expected for the size.
COMFORT: These waterproof shoes get hot and are hotter than the Keen equivalent waterproof shoe.  The foot bed is definitely not as good as the Keen, probably the most notable difference.
WATERPROOF: So far, so good.  I had to wade into shallow water and my feet were dry until the water got deep enough to overtop the shoe.
OVERALL QUALITY: I have high hopes that the heel on this shoe will not wear as quickly.  Quality of the shoes seems very high.

I rate these shoes as 4 stars out of 5, with the subtraction coming for the less comfortable foot bed than the competition and the lessened breathability resulting in more heat in the foot.  I can't help but feel that if the shoe had a breathable but waterproof fabric, the shoes would feel cooler and more comfortable for extended wear.