I just got the exhaust installed this afternoon.
I will try to make some videos this week end. So far, no drone at all.
In terms of decibels, the exhaust is not as loud as what I recall from my previous exhaust*,
but I like the sound and I was told it should get louder as I put more miles on it.
When closed, it is almost impossible to tell from stock, in the lower RPM range, but if I floor it, it is clearly not stock.
I wished it was 100% like stock when closed, but I don't think any exhaust offers that possibility.
When opened, and in sport mode, it feels as if the car is faster than before, but I guess its just the thrill because of the sound.

The installation took longer than I expected, and more than half of time was spent working on the wiring from the muffler valve to the OBD.
BTW, the exhaust is really light compared to stock.
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* Jun.BL GT non-EVC - kept less than a month because of the drone at cruising speeds