The game has been out for a few days now! I've played through the tutorials, and started in on the single player campaign. Here are my impressions so far:
Gameplay: Very smooth! BFG:L does exactly what it says on the tin; it's the BFG tabletop ruleset in electronic form. The beauty of this is that it takes a lot of the guess work out of the game; it handles all the movement and shooting modifiers for you for example. It also has some smart short-cuts built in. For example, when you select a ship or squadron during the shooting phase, it automatically rolls the leadership check to see if you can shoot at something other than the closest target.
Visuals: Captures the look of the tabletop models very well. The models are less detailed than the ships in BFG: Armada, but that is to be expected. You can't tell on a phone screen, and it is still not too bad on a larger iPad. The effects for weapons fire, maneuvering, and the like all look great!
Sound: Passably done. The music is OK, the weapons effects and voice samples for the units sound good.
Overall: Well worth the $5.99 price point! If you like BFG, and if you have an iOS device (sorry, no Android version as of yet), then definitely check this one out. The only bad parts I can see so far is that the faction selection is pretty limited; there is only the IN, 'Nids, and Space Marines at this point. I'm really hoping that the game does well enough that other factions are introduced in the future. Even if they are expansion packs that are being sold for $3 a piece or so, I would snap them up!
Anyway, stay tuned. I plan on putting together some more in-depth impressions on the blog later this week after I've played the campaign some more.