This board is ok. Stabilization requires a lot of tuning for average results. The mission planner software is great and useful but this product is not a genuine 3dr apm product which means that certain accessories, such as GPS and external compasses, may not function correctly since mission planner is a 3dr software. My buddy and I both have this board and our external compass and GPS units were not recognized due to this issue. Furthermore, my compass inside the board is iffy at best. It should be noted that the copter must be facing due north when powered on to obtain the correct orientation. I wouldn't recommend this product due to these issues and the fact that there are better boards for the same money out there.