Three months ago, I gave a quick review of the Logitech M585 Wireless Mouse. In the past couple of weeks, I've started having trouble with this mouse, so I can no longer recommend it. When my laptop first starts up, the mouse has trouble staying connected (I connect via their Unifying USB receiver). The connection drops out repeatedly causing the mouse to stutter. I tried switching to Bluetooth connectivity mode, but that experience was even worse! The lag when operating over Bluetooth was comically bad.
This connection issue persists for the first 10 minutes or so of my laptop usage. After that, things magically start working again. Rebooting doesn't seem to trigger the problem, interestingly enough. It only seems to appear on a cold boot.
To top matters off, I've already had a battery die on me with this mouse, and I've only owned it for about 7 months. The second battery I installed is also nearly dead, according to the Logitech software. I could go for a couple of years on a single battery using my previous Logitech mouse, so this is a real disappointment. Many Logitech mouse models have poor reviews at Amazon, indicating to me that they've clearly dropped the ball on their quality control.
I've ordered a Kensington wired mouse to replace this one, figuring that going back to a wired model will obviate these types of problems. Hopefully a different brand will provide me with an improved experience. I'll report back once I've received the new mouse (it should be here this weekend) and put it through its paces.