Very good keyboard.
The K65 is a very good keyboard, relatively heavier than other keyboards but still very good. It feels very light when you press the keys, it's very fluid and has a good response time (I use it plugged in with a usb-c cable). The RGB is nice (I don't really like RGB but it will please those who do). Can be configured with Corsair ICUE ). The keys are customisable, which is just a detail for me but it might be useful to mention it for those who like it.
I use this keyboard mainly for gaming, FPS, MMO,... and I don't regret the purchase despite the relatively high price, you won't be disappointed.
( Product bought directly in shop on 12/06, in one evening it easily and quickly replaced my old G213 from logitech. )
However, I'm "only" giving it 4 stars for the price, which might put some people off, although in my opinion it's worth it, it's still expensive!