I have bought a SK-720 for a while and it is sitting well in the package for quite some time. After fluing my 450 for about +/- 300 flight with a beastX on it, I just swapped the unit for an SK-720, I noticed a good difference.

Cyclic is a little better, more connected & more locked-in, overall this is not a big improvement, but the big difference is in the tail, this is night and day difference, the SK-720 tail hold much better, I still had some tail blow out here and there with beastX, even with V3 software, now there is no more blow out with SK whatever I do, piro consistency is much better also.

BX is great for the price, this is a solid unit, but I feel SK-720 is better and this will be a killer.