It is a little difficult to connect to the GT2560 board. You must to do a weld and it is not so easy. You must also know the board pinout to select the proper pin and assign it in Marlin. Then a better info from the seller would be very useful for the user. The device runs perfectly and it is a good option to forgive the filament width issues.
I was initially apprehensive about soldering the tiny little sensor onto the board but it turned out to be really easy as the instructions were clear and helpful. Aside from some slight confusion with the SMD capacitors with the extra through holes, which turned out to be a blessing in disguise ( I am really bad at SMD ) it all went together. In total, 4 kits were purchased and assembled by myself and a friend and we had 100% success rate.
As to whether or not it is improving my print quality.... That isn't really the point.