If you’re using an A6X at an angle, like resting it on an arm of a couch, the gesture fails more than it works.

It also fails if part of your other hand brushes the screen.

It just doesn't consistently work and I end up with several circles drawn around what I'm trying to erase that I end up having to erase as well. There's apparently some magic angle/distance to hold your fingers apart at and if you deviate even a small amount it doesn't pick it up. Having any part of your other hand/other fingers on the screen as well will cause it to not work either. Someone on the subreddit told me that what has been working for them is to hold their 2 fingers vertical along the left side of the screen and that's been working for me better than what I was doing, but it still often doesn't pick it up. I just today finally got my Lany EMR stylus in and am enjoying the dedicated erase button much more.

You may be looking at reviews for the linux version maybe? The gesture erase has only been on the android version since the latest update and most everyone I've spoken to in the supernote subreddit about it agrees it's not super great at the moment.

Other than that issue I'm a big fan, let me know if you have any other questions, happy to share my experience.

edit - one suggestion, the battery lasts much longer with wifi off, so I would suggest leaving it off and turning it on briefly whenever you want to sync notes, if you even care to do that, and check for updates every once in a while.