The second most important obstacle is getting a hold of the titles themselves. If, however, you're new to this, don't bother changing anything, or you might render the whole system useless. As far as adjustments and options are concerned, if you know what you're doing you'll have plenty to adjust. While the app will indeed do all the installing, grabbing the software, and understanding how and why it is needed can be a tad complicated. You'll have to grab the latest PS3 system software from the official Sony website and import it with RPCS3. One particular issue is getting the system ready to run any games or titles.
Getting it properly set up will require above average computer and console knowledge. While we're used to emulators being a simple application allowing us to load a ROM or two in order to play our childhood games, RPCS3 is nothing of the sort. Regardless, the emulator itself is pretty complex and polished in the sense that it feels as if it has been developed by a company and not a handful of people. You'll need a pretty powerful machine to be able to run any PS3 games on your device and even then there might still be the occasional bugs. RPCS3 is a polished PS3 emulator for those individuals who'd like to enjoy Sony's console game releases o their PC.
