Let me just say that I love playing this game....at the early tank levels. Once you get to mid-tier and above, it is painful. The game becomes unbalanced. The economy is broken. Mainly by the repair mechanic for your damaged vehicles.
This game is technically free to play, but only at the most basic level. As you get more advanced vehicles, you will need to buy premium time and vehicles to keep playing.
I really want to give this game 5 stars, but the economics is just too brutal.