For fear of sounding like an anorak (or something even less polite) I can highly recommend Microsoft FS2004 and the UK VFR Photographic Scenery. I am currently at the NAV stage in the PPL and use the above software to practise NAV flights before I fly them for real.
I draw up the route on my 1/2 mil map, fill in the VFR nav log as for real and then "fly" the route in FS2004. You can even add "real weather" if you are so inclined (invariably being in the UK the weather is
so it's easier to dial in "clear skies" and just practise spotting the landmarks from 2000ft!)
Doing it this way has helped to familiarize me with our local training area and get a good idea of what VRPs look like from altitude especially on the longer legs to unfamiliar airfields.
FS2004 CANNOT replicate such things as density altitude airspeed differences or magnetic (or compass) variation. However as a basic tool for familiarizing yourself with your local area from altitude I find it an excellent tool.
Regards
Andy