I started trail running about 8 months ago and needed a good trail shoe.  My coach recommended Montrail.  After running trails in my street shoes, I realized I needed a shoe that would keep my feet dry through mud and water in addition to better traction.  These have not let me down.  With the Outdry (Gore-tex like material) my feet stay completely dry and warm.  I don't even think about my feet when running in sub-freezing temperatures or through snow.  I have gone through deep mud and plenty of deep puddles and my feet stay dry.

The fit on these is true to size.  I wear an 8 and my foot is slightly wide.  The toe box is quite large so this may take some getting used to.  If anything this shoe runs a tad large.  If I tighten the laces well, the fit is perfect for me.  The soles are very grippy and it makes a huge difference in traction compared with a regular running shoe.  I like how stable this shoe is.  It has cushion to it but not so much that you can't feel the terrain.

I would not hesitate to get another pair after mine are worn out.