Having spent the last few days (well about 8 hours actually) with my new copy of RANT I am well impressed. It is excellent. In that few hours it has already unknotted, un-muddyed, explained and clarified more stuff about radio navigation than a month of reading old PPL notes, surfing the net for a half way decent explanations or messing around with FS2000 could ever do.
I don't think the demo does it justice at all. The makers should try putting a 10 day time-out on a full version of it for demo purposes or something.
Anyway best £90 I've spent this year. No competition.