Superb Product
Sky Demon from my point of view is a superb product. I know that a lot of older pilots don't like it but I do, it gives me a level of accuracy I could only dream of without GPS etc. I use a samsung Galaxy in a mount in the cockpit I also have my iPhone that can act as a backup. I can read Notams, get the weather etc. I can imagine that there are lots of different tweaks that they are working on at the moment because they seem to think of everything.
I recently flew from Slovenia to Dublin, not one leg worked out as we had anticipated due mainly to weather. As a result we were planning routes in minutes that would have taken us many hours to plan without SkyDemon. In fact I don't think I would go flying without it.
One word of cation, I have been let down by a Garmin Glo that I used to use in the past, this was a non event as I was flying in more familiar surroundings at the time, but If I lost my GPS over somewhere like the south east of the UK I think I would just land the aircraft.