Logitech Signature M650 Wireless Mouse

I’ve been using Logitech mice and trackpads for a few decades, and I’ve been pleased with almost all of them. Because of my work I have many computers at work near each other and a similar issue at home. In almost all cases I use Logitech wireless devices with their Unifying receivers (dongles) which I like because if a dongle is lost (they’re tiny and sometimes I find that someone has disposed of a computer with the mouse in good shape so they save it and then realize they forgot to remove the tiny USB dongle, but in that case I often have an extra dongle, and the Logitech Unifying software works well to pair the mouse (or keyboard) with a different dongle. However, I noticed a couple of months ago that a new M705 on my main computer at home was acting oddly, and I wondered if it was just too many Logitech wireless devices to near each other. This mouse is sold as a “business account” device, though you can buy it with a non-business Amazon account, it just takes a bit more hunting for it. The big selling feature is that it uses different communication than the other Logitech devices, and it is supposed to be more secure, hence the business sales. I tried this mouse and it’s a mixed bag: PROS: 1) There appears to be no interference between the old-type devices and this new one and it works well, so that solved the interference problem, if that was the issue for me. 2) It is incredibly quiet: there is virtually no sound whatsoever, none when you click or use the wheel, certainly if there’s a ‘click sound’ it’s very very muted and I think most people would consider there to be ‘no sound’. I like that but you may not. I've listed it as a PRO but it won't be for some people. 3) This requires a new version of the Logitech Options software, named “Logitech Options +” (note the plus sign). Note that this software will comfortably exist with the older software (either Options or the older SetPoint, which you may need for other devices) and just ignores the other devices. 4) Unlike many desktop-oriented mice these days, it has a storage area for the dongle. You may not need it often, but since there is (as yet, that I’ve seen) no equivalent of the old ‘Unifying software’ for these new devices, if you confuse which dongle is for what, you are up a creek. Also, you can buy replacement dongles for the Unifying devices, but I haven't see one for this yet, and the dongles are pretty nondescript, unless the Unifying dongles, which have that logo on them. CONS: 1) This is the cheapest-feeling Logitech device I have ever seen or used, and unlike models like the M705 which last for years, I’ll be glad if I get a couple of years out of this, as every single thing about it screams “cheap”. This is a case where you’re definitely paying for the new, more secure, communications. 2) This isn’t a large mouse, but closer to desktop than laptop size. I mention this because the right and left click buttons are very easy to push because they take almost no pressure. Some reviewers have written that they can’t rest their fingers on those buttons because it’s too easy to press them. I don’t have this issue because I have slightly larger than average guy hands, and I rest the base of my palms on the desk so while my fingers are positioned on those buttons, there’s not enough pressure to activate them. But they are really really easy to trigger accidentally. 3) This is a minor thing, but still: Using this mouse on a hard-surface desk, when you move it, it almost feels as though it’s going to scratch the surface. This makes sense if you compare the pure plastic contact areas on the bottom of this mouse with the higher-quality contact areas on even cheap older Logitech mice. 4) If this didn’t have the ‘Logi’ symbol on it and someone were to hand it to me, I would assume it was some off-brand $15 mouse. In sum, if you aren't forced to use this mouse, I'd stick with one of the better-made models. If, on the other hand, you like a quiet medium-sized mouse, and you prefer very easy to press buttons, you might like this. I've gotten used to the noise it makes when moving it on a hard surface, but at some point I'm going to look for better 'pads' to put on the bottom.