Very good in all aspects. Quiet (with adjustable fan speed) and most importantly, real hot swap! I have installed 2 12TB drives, an 8TB drive, and a 4TB drive and it works perfectly. The drives can be inserted and removed without the need to disconnect from the operating system (although it is a very good practice to always do so). Implementation exactly the same as the German Fantec. I imagine it's the same Chinese manufacturer with a different label. I used a 2-drive docking station until recently, but quite often and mainly without any reason (forceful removal of the drive or power interruption, etc.) the drives would lose their contents and the partition would become RAW! Now, this is a bad memory and the docking station is in the closet!

Very good metal construction.
Adjustable fan speed and generally very quiet in terms of disk noise.

Very convenient when you have many disks and want to see them separately on your system, quiet and fast (usb3) served me great.

For its price (compared to other similar ones on the market), it is a very good solution for storage outside the tower. It can hold up to 4 x 3.5" hard drives, works perfectly with 4TB hard drives, and does not have RAID capabilities.
For someone who has high storage requirements and is looking for a solution for both always-on and on-demand use of the hard drives, it is an ideal solution.
Compared to having four external ones (which means a bunch of cables and four different power supplies for 3.5" drives), it is incomparable.
The downside is the way USB 3.0 works, as it completely spins down the hard drives after a certain period of time. So when you "request" something from them, you have to wait a few seconds for them to spin up, etc. However, this is not an issue specific to this product but rather a general issue with USB 3.0, I believe.