@Vangeli Are you able to weigh the MagSafe Duo against the Butterfly? All published weights (~10oz) for MagSafe Duo say it's heavier than the Butterfly, despite the thick aluminum build.
I picked one up as soon as it was released and have been using it during an Asia trip. I didn't bother taking the international USB-C adapter kit, as I already have a more compact 30W adapter and dedicated universal adapter. I really wish they'd make the ButterFly available unbundled (without the bag, cord and adapters) at a lower cost. But soon we'll hopefully see lower cost Qi2 options that charge at 15W without the need for costly MagSafe certification.
In my testing, it's possible to use it in kickstand mode for StandBy visualizations while
also charging a watch, but the weight imbalance makes it unstable. This is because the weight of the devices will break the stacked magnet strength. (In the photo below, there's no phone in the case, so it stays up without the need to balance.) However, if you grab your phone while it's in kickstand mode, the charger will fall down, partially negating its nighttime usefulness.
Overall, I've found it satisfying to use, though I wish it were a bit lighter and thinner. USB-C power means I can (and often did) temporarily unplug the ButterFly to fast charge my iPhone 15 @ max speeds.