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 Jacqueline Garrabrant

Edit: My original rating still stands. I'm editing it because I took my old computer and trackball with me on the trip. When I got home, I started using my new computer and trackball again. The difference between my old trackball and my new one is like night and day! This (M575) is COMPLETE GARBAGE! I'm going to reconfigure my device to use my old trackball with my new computer and use this piece of junk on my old computer. Do yourself a favor and stay away from the Logitech ERGO M575 trackball. It's really badly done. Having tried two devices, I can say that in my experience this has nothing to do with the usual Logitech quality or craftsmanship. Original review: A few days after installation, the 'Left Click' button didn't appear afterwards. was suppressed. I can use it for a while, then I have to manually pull the button up and use it a few more times. Then it starts jerking again. I can't "left click" again and moving the mouse "selects" everything, even when I'm not trying to select anything. A REAL pain when trying to write a correspondence or even this review! I have personally owned 5 or 6 of their previous models. I bought even more previous models for my employees. They have always been of excellent quality. Now I'm not sure if this "new model" just isn't the same as the old ones, or if I just have a bad block. If I hadn't thrown the box away immediately after installation, I would have sent it back. Anyway, I think it's just not that good, and that's why I'm considering looking at other brands.