It does not delay in file transfer. Speeds around 90-100 MiB/s. If you need it for transferring multiple files, the file system you choose during formatting also matters.
For the money I paid for its use, I would have gotten a better external SSD (But unfortunately, I didn't know that there was an external SSD in such a price range). Other than that, it does its job just fine.

TL/DR: Excellent USB stick with very good speed and affordable price.

It is the fastest USB stick I have tried. In my tests, when copying a folder of 7.8 GB containing 5,804 files, the average transfer speed was 29.8 MB/s and it took 4:28 minutes to complete. The port used was 3.2 Gen2, the stick format was exFAT, and the source disk was NVME. To give you a comparison, an external 2.5" HDD takes 2:30 minutes to transfer the same files and the speed is 50 MB/s. The price is about double compared to "regular" sticks, but you get double the speed, which is still lower than an outdated external HDD. The slide mechanism impressed me with its durability and the stick also comes with a lifetime warranty.

You don't have the option to make it FAT32, so it doesn't have the ability to play in a car source.

Reading speed is expected (satisfactory), writing speed is tragic (especially for a large number of files, the situation becomes desperate). Much lower than the cheapest Ultraflair from the same company.

This specific USB stick is USB 3.2 Gen 1 (type-A), which means it belongs to the USB 3.2 Gen 1x1 category with a transfer speed of 5Gbps (similar to USB 3.1 Gen 1 or USB 3.0). These are the tricks that companies use in the names of their products for marketing purposes, just like they have been doing with screen/TV resolutions for years.

However, it does exactly what it promises: It writes at a speed of 100MB/s and reads files at a speed greater than 395MB/s. In my first test, I transferred 3 files with capacities of 1GB, 1.5GB, and 2GB, and in the second test, I transferred 48 files, each with a size of 550MB. In both cases, the write speed did not drop below 97MB/s. Additionally, the benchmark test using CrystalDiskMark, with a 32GB test size and 9 passes, seems to confirm these speeds.

Therefore, at the price of €23 that I bought it for, it is a good choice and also heats up very minimally, so it will last for years. I highly recommend it!