Interesting to hear views on level busts.
I had an outbound go 200 feet above its cleared level whilst departing like a rocket (cleared to 3000 feet)
The inbound at 4000 feet had a TCAS climb and the STCA (Short Term Conflict Alert) flashed on my radar screen and the CAA SRG regulated SMF (Separation Monitoring Function) tripped as standard separation was lost.
Level Bust??!?!?!?