Review on Logitech ERGO M575 Wireless Trackball Mouse with Easy Thumb Control, Precision Tracking, Ergonomic Comfort Design for Windows/Mac, Bluetooth & USB Connectivity - Graphite by Garry Ortiz

I think I've owned most Logitech trackballs for over a year, with a brief hiatus in the last few decades due to laptop and desktop touchpad use. Two years ago I bought an MX Ergo trackball. Good, but expensive and the feeling is not quite right. Mine has a sloping aluminum base but no additional rubber base, but it's still more than tall enough. I received the M575 a few days ago and loved it straight away. You need a free app called Sensible Side Buttons for the navigation buttons to work on a Mac, but otherwise it was perfectly smooth. I'm tempted to replace the Ergo on my Linux machine with a second M575.