I owned a '13 350 xcf.
Sold it after trying for a year to get it to handle and to get the forks to work.
The bike was very reliable and never let me down in that area.
Power is very, very soft, and there is only 23 ftlbs of torque.
The power delivery is so soft, that the clutch or max rpm is required to get anything to happen.
I re-mapped it to SXF-agressive, changed the ex manifold, pipe, etc.
Finally got it to be jusssst enough to pull 3rd gear down to low rpms and up to high rpms, on flat terrain.
Before the work I did, you had to down shift for every corner, every time.
It was just enough power, no more. But still very soft in delivery.
But the real problem was the handling. Very hard to hold a line under power or under breaking. Just squirelly all the time.
I tried revalving the suspension 3 times, and it only would give me a few more mph of control each time, but above that speed, terrible.
I have set up 27 bikes for me, 3 of them KTM's. If you like feet-on-the-ground riding with lots of obstacles, the KTM is good for that.
If you like turning with the power on the rear wheel, or being able to transfer weight front to back by where you sit, for changes in handling, it's not good for that.
The KTM's were just no fun to ride fast, unless on a track where you had lots of line choices.....but on fast single track, it was awful. Just fine on the really tight stuff.
The SXF based bikes for 2016 handle better (I have ridden them all), and the power is more aggressive
The EXC based bikes for 2016 are unchanged.
I am currently looking at the 2016 BETA's as a possible alternative Dual sport.