I looked carefully at the G900, so I'll be interested to hear about your experiences with it. My MX Master arrives today and I'll pass along my thoughts as well.
Okay, it's a bit soon for an experience report, but my initial impressions of the Logitech G900 are very positive, compared to the already pretty good Performance MX mouse that it will replace.
The G900 an expensive mouse, no doubt, but if it's durable enough to last several years then the daily user experience becomes more important. And this user's experience is very positive.
The mouse is very light, even if the battery to make it a wireless mouse adds some weight. Because it is so light, it glides very smoothly, and it's easy to lift and reposition on the mouse pad. It is smaller that I anticipated, but the Performance MX is huge by comparison, so it's probably something to get used to. I'm not sure if people with large hands find it too small, but that also depends on how one grips the mouse (Palm/Claw/Finger). The mouse can be used ambidextrously, which is also a bonus for left handed people because there are only a few mice suitable for left-handers. Buttons can be physically repositioned (using magnetic connectors), added or eliminated, or reprogrammed. So it can be configured to taste or for specific tasks, should one wish to do so. It can store 5 profiles in the mouse, so when used on another computer, the profiles are always available.
The G900 is very
fast and responsive. When waking up from sleep mode (after 10 minutes of inactivity), it's fully active in perhaps less than half a second. From that moment on, it is as fast as (in some cases even faster than) wired mice. It has no problem following fast movements (it apparently can even follow 40G acceleration forces) and it shows no latency. It is (@ 1 millisecond, 1000 samples/second) polled faster than even the fastest displays can refresh their pixels. It apparently also does very well in situations with a lot of radio frequency noise. In my location, I'm surrounded by an increasing number of routers (with some 64 access points) from neighbors, all competing for similar frequencies in the 2.4 GHz bands, but the G900 is not bothered at all, it doesn't skip a beat. Lines that are drawn with the mouse (although I'd more likely use a tablet and pen for that), are smooth and do not jump positions. Only at the highest DPI settings, the mouse pointer moves so fast that (mostly lack of) manual dexterity causes inexact drawings.
What may turn out to be useful, is that the DPI sensitivity can be dynamically adjusted with 2 buttons on the mouse itself. If more precision is needed e.g. for detailed retouching, one can reduce the DPI setting to make the mouse pointer move slower for the same distance the mouse is moved. I know it can also be adjusted via the utility in the Windows system tray, but it's faster to do it directly on the mouse (so it might be used more often in practice). For very large displays (4K and 8K), the DPI setting can be increased to cover the larger number of pixels the pointer must travel.
For long document scrolling and browsing of long web pages, the scroll-wheel has the same ability as the Performance MX and Master mice. Flicking the wheel in free-run mode makes it continuously spin for almost 10 seconds while the document keeps scrolling on-screen. With the press of a button, the scroll wheel changes to using clicks to scroll line by line. The scroll wheel is easier to use for left/right scrolling than with my Performance MX.
Battery life looks good (some 80% left after one day of use), and switching off the light effects can add some additional 4 hours of battery life. Without lights and at the fastest polling setting it is rated at some 32 hours of continuous
use, so several days to a week with moments of sleep and inactivity on a single charge, and the mouse can be recharged in a couple of hours via a very nice braided flexible USB cable. While charging goes on, the mouse can be used normally like a wired mouse. The mouse is supposed to function at the same high responsiveness level, regardless of the remaining charge level, and it uses an accurate capacity measurement method based on actual mA usage and remaining capacity. By changing responsiveness settings to a lower polling rate, one can reduce power consumption and achieve prolonged use. Power management during use seems to be very effectively controlled.Here
's a good review (from a gamer's perspective). For Photoshop and similar use, the requirements are a bit different but the responsiveness and reliability come in very handy and make it a joy to work with. Maybe some of the additional button options can be programmed to perform application-specific repetitive tasks.
That's it for the moment. Initially very expensive (compared to alternative mice), but very fast and reliable in actual use. So far, I'm happy with the choice I made.