I agree the pmu won't work with othe controllers, however the DJI is an esc, one without a bec, and a pretty damn good one, considering it has an input refresh rate up to 450. It should work just fine using a good quality bec like the 10a CC bec. I'm really planning on going with these to upgrade my f450 with mt2216-900kv motors. Should be a good combo.
However, the new 4.01 HW esc's look so inviting.