I own the full version of FG since shortly before the Steam Launch. I think it is very important to realize that Fantasy Grounds by itself is not a full game - it is a tool and might be better fitting for the Software Section of Steam rather than the Games section.
There is a high learning curve to the game for a Game Master. It takes a few hours to get used to the rules sets, the various tools provided and all the little things you need to consider. Once you do spend these hours to familiarize yourself you have a powerful tool to handle campaigns, battle maps and characters.
We started playing Savage Worlds in Fantasy Grounds and are having a blast. As an experienced pen & paper player, I have to say that gameplay is actually sped up by the tools provided, allowing us more time to actually roleplay and less time discussing rules, piece positioning or anything else.
If you are willing to tackle the initial learning curve and understand that FG is more a tool than it is a game, I can highly recommend it to you. If you are expecting a highly interactive video game however, you might want to direct your attention towards Divinity: Original Sin or something similiar.