I live in Oregon so trail running is a must.  These have been through 4 runs totalling around 25 miles so far.  I always wear the local Beaverton leading brand so Adidas are a departure for me. The trails I run on are a mixture of packed dirt, tree branches, sandy dirt, pebbles and rock.  The terrain is very hilly with lots of turns.  The benefit of trail running shoes vs. regular running is to give you better grip in those elements but also to give those elements a space between the tread to go so the ride is more forgiving.  Slipping on trails that can be narrow is not an option.  Trails can also be muddy.

-I generally wear a size 9, but these size 9.5 seem to fit just fine.
-I love the tread on these.  Great for the terrain mentioned above.
-The ride overall is good to very good.  I can gauge a shoe based upon how my knees or joints will feel and with these I feel the same as after my normal brand.  So thats great.
-A bit key with trail running shoes is that they need to be reasonably malleable.  The terrain changes quickly and if the shoe is too stiff it will be awkward.  I think these have a great balance between stiffness and being too malleable.
-Styling is more conservative than I like but the blue matches with most things.

I wasn't sure if these were going to be my primary running shoes or not, but after three good runs, I just think they will be.