Lots of bad reviews is it as good as people say?

I'm using two of these Startech USB 3.1's at the same time with 16TB and 18TB HDDs in them for a total of 4 drives without any problems.

I have a HD with unreparable bad sectors but still running. If I want to replace the HD, is this the best way to go? No need to by new OS?

If by unrepairable you mean SMART Current Pending Sector then offline duplication is NOT recommended. Tested on SDOCK2U33RE with a 1.5TB drive w/ 6 reported errors the duplication was still at 0% after 24 hours. Also be advised this model is NOT capable of retrieving SMART data over USB (newer chipset than older models). You're going to have to use ddrescue or such.

Can I use as docking station

I had the same question. Yes, it can be used as a dock, both bays functioning at the same time with hard drives in each bay. But be advised that this unit cannot actually achieve the advertised 10Gbps speeds -- even if using 2 SSDs in RAID 0 -- because this unit only has a single SATA III controller for both drive bays, which caps the total access speed at 6Gbps.

Can I clone a Samsung 970 evo to any other m2 ssd (intel, hp, ect)?

No, SDOCK2U313R supports 2.5" & 3.5" SATA SSD/HDD drives not NVMe based SSDs such as the Samsung 970 Evo. Atha, StarTech.com Support

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🚀 Clone Like a Pro with StarTech!

COMPACT PORTABLE - Lightweight design (500g) makes it easy to take your data on the go.
ENHANCED PERFORMANCE - Utilizes SATA III (6 Gbps) and UASP for optimal data transfer efficiency.
EFFORTLESS DUPLICATION - Clone drives without a host computer—just plug and play!
VERSATILE COMPATIBILITY - Supports both 2.5in and 3.5in SATA drives for ultimate flexibility.
LIGHTNING FAST TRANSFERS - Experience blazing speeds of up to 22GB/m for quick backups.

The StarTech 6Gbps USB 3.0/eSATA to SATA Duplicator Dock allows you to clone 2.5in/3.5in SATA drives without needing a host computer. With lightning-fast duplication speeds of 22GB/m and support for SATA III (6 Gbps) and UASP, this dock is perfect for professionals needing efficient data management. Its compact design and compatibility with up to 4TB drives make it an essential tool for any tech-savvy manager.

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Memory Storage Capacity	4 TB
Compatible Devices	Laptop
Hard Disk Form Factor	2.5 Inches
Max Number of Supported Devices	1
Data Transfer Rate	5 Gigabits Per Second
Global Trade Identification Number	00065030855884
Manufacturer	StarTech
UPC	065030855884
Form Factor	3.5-inch
Item Height	8.27 Inches
Item Width	4.76 Inches
Product Dimensions	18.69 x 12.09 x 21.01 cm; 500 g
Item model number	SDOCK2U33RE
Hard Drive Size	4 TB
Are Batteries Included	No
Country of Origin	USA
Item Weight	500 g

StarTech 6Gbps USB 3.0/eSATA to 2.5-Inch/3.5-Inch SATA Hard Disk Drive/Solid State Drive Duplicator Dock (SDOCK2U33RE)

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