I've been using it on my gaming rig/dev workstation for nearly a year and its been great. Games work great. I had some issues with printer drivers, and with some dev tools. I hadn't used a fedora-based system in years so many of my issues likely stemmed from that. Editors seem to be confused by the home symlink, especially IntelliJ et al.
Overall I'd highly recommend it. Someone mentioned slow boot, but that hasn't been my experience. It boots within a few seconds.
I dunno about PHP Storm, but I've used pretty much all their other IDEs and they're hands down better than their competitors. I wish they had picked better names for Data Grip and Data Spell though. I can never keep track of which is which.