I've been using On Top 8 as my IFR training sim, and it's not bad, but I
have two problems with it:

1) It is terribly oversensitive in pitch (with my CH yoke at least) and
there seems to be no way around this.

2) My main machine is a dual G5 PowerMac and I'd be much happier with a
Mac sim. Unfortunately, they are few and far between.

But there's X-Plane. The flight sim junkies love it, but is it good
enough to use for IFR training? The feature set looks good. There is
even a free demo version but before I spend time with it I wanted to ask
if anybody here has experience with it. TIA.