Luckily I have not actually spent my money on these.. but we have had hundreds at work. I have had a Thunderbolt dock at my desk at work for about 4 years now, and have had one at home for 2 years now that I was able to expense. I've had both an OWC and a CalDigit Fail. My CalDigit at work failed last week after mostly sitting unused during the pandemic. IT had a rubbermaid bin full of broken ones.
I think the common thing we have is most of us have 2x 4k monitors.. one has to go into a Thunderbolt port and one goes into a DisplayPort. My desk at home only has one external monitor and seems to not generate problems. Usually one of the monitors will start to refuse to work.
The CalDigit has one set of bugs with Intel Macs and a different set of bugs with Apple Silicon IME.
Both of them have RF interference issues as well with things like Microsoft and Logitech wireless mice and keyboards.
It's all too bad cause the user experience is great when they actually work. Single cable to get everything works great.
