This IDE doesn't seem to differ from CLion with Rust plugin. I guess, its only about making Rust plugin paid from their side – which makes sense from their side. I hope they can deliver quality. On the other hand, they are notoriously slow to develop their IDEs. Features are super slow to be delivered, IDEs themselves are not really improved as well. They are focusing on things most don't care: Spaces, new UI project…
Slow means stable. I don't understand how people rate software on this. Lot's of updates to a product means to me that the product is faulty.