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I bought Belkin Thunderbolt 3 Dock Core but I regret doing so. The DisplayPort video output worked once and then never again no matter what I did. So it is now effectively a single monitor solution for me. I also did not read the description properly: I have a MacBook Air with a 30W supply, and that does not work. The description page states max 60W power delivery which I interpreted as 30W being no problem, but smaller further down it states that minimum supply is 60W. And 60W is really minimum. So if you have a Macbook Pro, the normal power supply is ok, but if you have a MacBook are you need to shelf out significant additional money for a 60W supply.
After a couple of days, it works good for my case, and I frequently switch between two MacBook Pro produced in recent years, 2018-2020. Pro (not sure how it works on the older/Windows laptops) - Compact - Easy to use, just plugin Cons - The built-in cable is too short. - USB ports are less, no USB-C data transport port