Logitech Wireless Marathon Mouse M705 (Discontinued by Manufacturer)

I use these for PC gaming*, as well as on-the-go when I need to design 3D items on my laptop**. It's simple to use, convenient, and the batteries last... I wouldn't know: I've never had to change them, even on the one I've had for years. This is the second one I've bought, and although they've made some changes in the design, there's not much difference. If anything, they were improvements. *Most of the buttons are compatible with all games on Steam, but some of the older games (e.g. Oblivion) don't support the buttons on the side. **The receiver can stay in your laptop when travelling- It essentially creates a tiny bump, about 1/2 cm out, on the side. Alternatively, it neatly tucks into a compartment inside the mouse for easy transportation.