I tested this today with Unity 6.3 LTS, URP, with no issues. No render pipeline conversion necessary. It comes with good documentation. You have to download the font from an external URL, and drag and drop it in the asset folder. There are no demo scenes, or examples.

Ассет содержит исключительно картинки, ни анимаций, ни скриптов.

PSD included

it's not ready to use! bad quality!

You cannot use these out of the box, the sizes and alignments are all horribly skewed. Spinners are sized differently from the wheels they are supposed to spin in, this is an abysmal product, I wouldn't use this again if I got paid to use it.

The components are great, I would suggesst selling them elsewhere though. Having to download Unity just to get the file is a little bit annoying

I like this assets. To edit you must know basic photoshop. But it is amazing.

It's not ready to use. You should use PS for prepare it for that what you need. For example: PROGRESS BARS: You get 3 images for 1bar: https://i.imgur.com/Z83o4NX.png = you must cut/slice image to get slider/bar fill

You can get better things for free. All of the assets had to be manually edited in one way or another. Don't expect it to work for you unless what you see is exactly what you need.

Although the price is very low, I expected to have a prefab for each component. But now I have to stick them together by myself. Another point is, that the images are not usable out-of-the box, since the most of them need to be cropped right. For example the progress bar elements are not equal sized and thus aren't usable for spinning animations. As said: Looks good but needs a lot of additional work.