The game play is great but the amount of ads and how they play is ridiculous. I know this is how money is generated but it should be something like 20 sec max for an ad but some go on for 30 sec plus and then add an further time on to the ends. I know you can pay, but £4.50 for one app is too high. You could have so many more loyal players if this was managed better. The Duels game constantly crashes meaning you have to force stop and access again and watch an ad again even though won!