SkyDemon rocks
 

I have only done about 20 hours since recently completing my PPL. Although I have little to compare it to, I find Sky Demon excellent for planning flights, printing kneeboard logs, having in the cockpit on my Fujitsu N560 handheld and then downloading the track onto my computer afterwards to see where I went. What concerns me a bit is that it is so easy to put all your trust in it and get out of practice calculating headings and RNAV values, doing COG and fuel calcs manually. So far it is money well spent for me.