Worth it
It certainly isnt perfect (there are points where this game lags just a tiny bit and it has crashed on me once or twice, and indeed the game is not fitted to the iPhone 5 screen) but none of the flaws are something that cant be fixed with an update. The game is incredible, as would be expected, and overall I think it runs much faster than the PSP version, and the redrawn sprites are just an added bonus. I only wish it drained your battery a little slower.
Paplyk about
FINAL FANTASY TACTICS :WotL, v1.2.0