I have a Rekluse in my YZ 250. Don't mistake it for a semi-auto. It is still very important to be in the right gear. Remember that the whole theory behind this great product is that it "slips" the clutch for you and alot more precisely. I won'tgo into the technicals as their website it is full of great info.
I will say that you still have to ride with good throttle control and clutch control. This Rekluse just helps in the clutch control regard. In fact I recommend that most folks learn to use a standard clutch and learn good throttle control before purchasing a Rekluse.
But it does eleminate most of your stalling issues. At lower rpm, especially when lug the bike, it will slip better than you or I can slip the clutch to maintain traction.