Question M.2 NVMe to USB adapter ?

Pimpom

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I'm thinking of using an NVMe SSD as one backup method but I don't have a compatible motherboard right now (I'll probably get a new rig later this year). I do have a USB 3.1 Gen 2 port.
For the time being, the only way I can use it is as an external drive through an M.2 to USB adapter like this (not necessarily this particular model).
https://www.amazon.com/SSK-Aluminum-Enclosure-Adapter-External/dp/B07MNFH1PX/ref=sr_1_3?crid=R8DF43VXLGZM&keywords=m.2+to+usb+adapter&qid=1678613075&sprefix=m.2+to+usb+adapter,aps,316&sr=8-3

I'm aware that there are SATA-only, NVMe-only as well as SATA + NVMe combination models, and that the speed will be limited to USB speeds.
If anyone is using this type of adapter, could you share what kind of real-world performance you get?
 
NVMe prices are now comparable to those of SATA drives of the same class - DRAM, DRAM-less, TBW, etc. I see no reason to go for a SATA model.
The adapter can serve as a general purpose tool later, especially the dual SATA+NVMe models. I have a caseless SATA-to-USB adapter and often use it to work with 2.5" and 3.5" drives.

What I really want to know is how well the SSD adapters work, not if they work. E.g., do they approach the theoretical Gen 2 USB speed? Do they work reliably?