I have been using different PC flight simulators over the years, starting in the late 1980'ies. I did my IR in 1974 when PCs were not invented yet, it was a three hour round trip then to use an WW2 original Link Trainer. Even the most primitive (some UK software running under DOS, don't remember the name) was very useful for developing situational awareness. In IR flying a lot of the action is inside your brain.
I currently use X-Plane version 8.64 and 9.22 on Linux and MacPro (4 intel CPU). The more processing power you have the better. X-plane will run on PC, Mac and Linux. You can install the free demo version that will run for ten minutes in full capability but with a limited geographical area. Download the free demo from:
here.
I use the program a couple hours before my annual IR renewal and it really helps if you practice the approaches with unusual winds, low ceilings etc.
MSFS maybe more beautiful to look at but XP has a much better flight model.