I have it in black version, I bought it a few months ago from the Keychron website. I got the RGB version with brown switches.
1st negative, some keys are pressed with a delay, some are pressed twice (mainly the space). Whether I have it connected via Bluetooth or with a cable, the same problem occurs. Although due to the next issue, I always have it connected with a cable.
2nd negative, at a distance of 50-60 cm, the Bluetooth occasionally experiences momentary disconnects.
3rd negative, you order the RGB version to see the keys in the dark, and the keycaps are not see-through, I had to order other keycaps