I'm a big techie and love Logitech products. I've purchased many items from their product line (speakers, keyboards, mice, thumb drives, cables, etc.) and have never had an issue with any single item. I've had this mouse for at least 4 years and it's still running great. The usb connection port can be stored inside the mouse near the batteries and is extremely tiny so I typically just leave mine plugged into my laptop and it doesn't catch on anything. Range is very good and I have never lost connectivity when using. Battery life is on the excellent side, too, and there is a light that lets you know when they need replacing. Easy on/off switch on the back. Would recommend this.