Very powerful component, but hard to use. If you need some extra functionality, you need to know javascript and you probably need to create custom copy from this component to get that functionality in your app.

I which there would be similar features in normal table grid, without rest calls.

One of the most powerful widget.

It's the most amazing component I've ever seen. Although there are still many bugs now, I can easily fix and design according to my own ideas.
I am quite excited about its future.