I do not remember, with specificity, the nature of the complaints. I read reviews for many different docking stations and many different enclosures (it becomes a blur).
Yes, many complaints were for cloning. But it was not clear if the cloning was the issue, or if the unit itself was the issue, and people just happened to be cloning when they had issues (meaning, they might have had issues for non-cloning use).
People were complaining about losing data; drives becoming unusable, etc.
Some folks warned that you should format your drive outside of the unit, to avoid issues, etc.
I asked questions in youtube videos, and did not get satisfactory answers (and most of the time, no answer).
I made inquiries with the manufacturers about drive capacities, because many of them list in their description a 4TB or 8TB limit. I tried to find out whether that capacity limit was for the cloning feature, and if not using the cloning feature, could you use larger capacity drives?
Only one manufacturer replied (and it was like pulling teeth to get an answer ā a reply is not the same as an answer).
I finally had enough, and went with the Syba unit, based on others writing that they were using 16TB or 18TB drives, including folks in this forum. And the Syba units do not break the bank. They also have a built-in fan, and room for additional drives.
Lastly, I did not want to wait, because my LaCie USB drive that lost its partition was suddenly working, and I had an opportunity to copy everything elsewhere.
With the eSATA option, fan, high-capacity drive support, reasonable price, and what appears to be pretty good build quality, I made the purchase.