Nice Mini TR haydensydney. Sounds like the experience (odd plane sounds aside) was a good one.
I think if there are no 'issues' which require out-of-the-ordinary recovery action by the staff, then smooth experiences are probably as normal on JQ as on any other carrier. My one return trip with them (MEL-HBA-MEL) was fine, apart from the beer I bought being warm...but it was an unseasonally warm day.
That said, I have no plans to fly them again...but never say never, if circumstances suit!