After the last update last year its bad. Before the update when you where high level you could stay in a pvp battle for 10 minutes and it grew 11 minutes 12 minutes etc. The more you played the longer you could make it. The last update its bad you can do around 3 minutes and thats it you are basically setback, i could live with this if the normal levels you could gain gold and crystals so you can build up again, but they also nerfed you in normal play so you cant get enough crystals or gold unless you buy in their store.