Horses for courses I guess. I have Jeppview and Flightstar and the Rasta maps of Europe, Notams and weather all in one so I have a one stop shop for a flight plan.
I did not say there were any disadvantages to pro plan, it is just a bit basic for my needs. I like the fact VFR or IFR I have one common interface.
I plug in the route and out pops a full set of docs in colour that I clip to the kneeboard and off i go!
I also have flightstar running on several machines. The licence key allows 3 live at the same time. I can move the key around in seconds so it has never been a problem. I would suggest that someone who is using more than 1 copy at any time requires further licences as the licence is issued on a per user basis so the fact that Jepp allow 3 in use at once is pretty good.