This is so excruciatingly slow...
I've tested both this and CLion (C++) thoroughly. My system isn't slow. Yet, I felt like I had been transported back in time. The IDEs are so distressingly slow that it's hard to cope with them.
JetBrains advertises its features and the IDEs are truly packed with them. They show you nice little videos with examples of refactoring and all. In the videos everything works, as the examples are simple. In reality, things go wrong eventually. CLion can't really refactor anything out of the real world, except for renaming things – which is handled by the Clang library and thus is available everywhere (KDevelop, QtCreator, ...)!
I found that the major problem of this is that you spend about the same amount of time refactoring things, as you would with an advanced editor using search&replace. It's so unreliable that you have to check everything and – often enough – fix a lot of crap. This renders it mostly useless.
You will find that many of their “convenience functionality” is so bogus that the trade-off costs you more than doing things the traditional way.
I'm not criticizing functionality. When it works, it's super! However, whenever its unreliable – it becomes useless. Oh – and the speed or rather “the lack of it”... It lets you wait for all those convenience things; for ages!
I ended up dumping all JetBrain products and I won't go back, no matter how shiny their new advertisements. :-(