Yes I have used Flitedeck. It gives you Jepp's fairly primitive enroute charts, approach plates, but the SID/STARs are not georeferenced so running them under FD is of no use.
For IFR (airways) one uses the more normal kit (GPS and ILS etc) for nav. IMHO, FD is good for passenger use, to see how well or badly the pilot is doing on the IAP
The old Jepp FliteMap product was good - that would run all the Flitestar chart representations, plus the VFR Raster Charts. They discontinued FM around 2005.