I used Jeppesen IFR simulator for several years, but they never updated it to run with modern operating systems. Like Elite, it only offered a small visual window on top of the instrument panel, just enough to see if you were visual at minima or not; doing a low approach to minima in X-Plane is much more realistic, of course computer hardware has advanced greatly in the last 10 years. It would be a good idea to test any demo software before deciding, running power hungry software on a budget computer is not a good idea. On the other hand, a good computer plus the software of your choice is only going to cost the equivalent of a couple hours of flying and can save dozens of hours or make the real-life hours more productive. The cockpit is a lousy classroom, even simple things are harder to grasp when trying to fly straight and level in (simulated) IMC.
Don't use the PC simulator to teach yourself IFR, use it to practice and perfect what you've learned in flight.