I currently use PhpStorm but I've been keeping an eye on Rapid PHP for several years but still can't commit... v2018 is very close.
The biggest dealbreaker for me is the Rapid Php FTP.
PhpStorm has separate "Tool Windows" for local Project files and Remote Host instead of a combined "File Explorer" window.
PhpStorm is also smart enough to know where to download the files instead of having to hunt down the correct folder.
EDIT:
Even Dreamweaver CS6 links the server directories to the local directories.
Why is this so important? Wordpress plugins are frequently updated and my local files get outdated. For any given project I right click on the remote "plugins" directory and "Download from here", simple.
Maybe a screenshot will say it better.
I think if it wasn't for this I could dump PhpStorm and buy RapidPhp.
I don't use a local server, sync or version control and don't want to.
Thanks,
J