I was upgrading from an older G Pro, I think? I can't remember, but it cost around 3,000, it seems to me, and it was really great apart from the worn-out scroll wheel, so I was expecting basically the same, but better. The switches are really great, although it feels strange to use them at first. The mouse is extra light, so it's great for me, but some people might not like it. Now for the bad part. The look is good and bad at the same time. I don't know why there's a + on every button, the PRO X2 label is duplicated, and then again on the side. The harmony of the black and white colour scheme is completely ruined by extra symbols. I'd call the battery life a disaster. I had the impression from previous Logitech generations that the battery life was always great with minimal charging, but this one is empty every other day, it seems. So, a step backwards in development. For some unknown reason, the mouse has a different sensitivity when plugged in via cable, even though I set both to be the same in the settings. The numbers match, but in reality, it behaves differently, so with the more frequent charging, I'm more often dealing with a sensitivity I don't use. It might be fixable with a software update, but there's been no change so far. Considering the design flaws, this absurdly high price doesn't correspond to a flagship model at all. So, while the switches are the future of this brand, and if they are also 'immortal' in terms of lifespan, then that's top-notch, but only time will tell. For now, I wouldn't recommend this mouse to anyone and would rather wait for the next generations, mainly because of the disastrous battery. I would definitely choose the cheaper G Pro models or others from the current range next time.