This is fast and fun to play. Its also very helpful to have the option of playing in practice mode. It would rate 5 stars if not for these 3 items: 1) It only allows a few quiz choices in OT and in NT for the free version. $1.99 would be ok. (Not $6) 2) It doesnt show an opt out of "cheats" when they pop in on the iPhone app - restart seems the only option not to use them. 3) The nagging ad that most frequently pops up is of a buxom woman bounding across the screen for 13 seconds! Is that seriously what you predict a person playing this app would want to see on the screen? Guess again.