I did change the std. extruder gear to the BIQU Panda Claw Extruder for my Bambulab A1 Mini. The main reason was i print a lot of abrasive material where i see the need to make the extruder gear a bit more reliable then the original.
For now the exchange was working great with the provider install instruction. (Maybe i am a bit biased on that point because of my experience around 3d printer ¯\_(ツ)_/¯ ).
I could only see a small improvement in print quality compared to the original - but lets see what the long term usage will look like. I am pretty sure in the long term and for my use case it is a good investment to make the machine more robust and reliable.
I give 4 stars because I did not have the long term results with was the goal for the change from my point of view.