Its been a peach since day one...but knowing what has been before the release has been delayed so that more testing can be done in the field.
The starter and pump uses a fraction of the brushed units, so reliable starts still happen with discharged ECU packs. Output can be up to something like 7A!! the whole assembly is very free running, so its a small increase, obviously starting with a charged pack the system will recharge during the flight, if you are just using the ECU charging then with the small load starter and pump its only the burner working hard, my 140Rxi uses 300mAh per flight cycle, this will be much less. If you use the Rx pack charging then it is done from the ECU pack, so that is then drawn down. but the Rx is full. One flight will recharge the ECU pack. So long as you don't do lots of short "test" runs and fly each month you should never have to charge again!
It has the potential to be a huge leap for us all.