i've only been flying a couple months now, but i'm running aivlasoft on a secondary pc.
i think it's an awesome program, and definitely adds to the immersion when flying.
when you say "bogged down with complicated fuel planning" that's stuff most people here enjoy doing, so i believe your post may have turned off some people from answering. flight sim-ing is really just another form of role-playing.
but back to aivlasoft, it is not a simple install, it took me the better part of a day to get it all running and i consider myself a PC guy.
really it all boils down to how computer literate you are.
unless your pc is extremely slow it should have no effects on it at all.