Don’t trust to it. It doesn’t work.
I just lost about $60 in filament. I was right there when the filament ran out, and replaced it immediately. It went to resume (after 50+ hours of printing), and it skipped a layer. Nothing stuck, and I wound up with a bird’s nest on top of my 1/2 finished project.
The situation couldn’t have been more idea for a mid-print filament change, and it STILL failed. I lost more than a spool of filament on just this one iteration (and it took many to get here).
I’m too irritated to be disappointed…