Just back from a 9 mile, mixed surface run - and I'm impressed. Overall the materials are great and the fit is perfect (for my foot).
The outsole is well lugged for great offroad traction, but they are well placed for road running too. Not wobbly or rough under foot. Forefoot protection is perfect for techincal terrain - but no so stiff that you lose feel for the trail.
Drop is a personal thing, but I'm a big fan of the 4mm drop for trail running, keeps you low and your foot in a nice natural, neutral position.