This game has a lot of potential (Beta, still). The developers must fix a number of things but, it is entertaining.
1. The matchmaking sucks. If you have a low-tier tank, be prepared to play alone facing impossible odds. You will be faced with opponents you cannot damage (several Tiers above you). Of course, you can team up with your friends, but then the matchmaking is way more flawed. I have been riding a tier 3 tank and beein in tier 10 battles because my friend has a tier 6.
2. The spotting is dumb, all you do after one of your teammates has spotted an enemy is mouse over the area where the red icon is (marking your foe) and you will see an outline of the vehicle. No kidding, red outline, through bushes or trees. Defeats the purpose of hiding when you are playing a tank destroyer.
3. Loading times are based in the damage capabilities of your gun. So when you get the big tanks, you should bring reading material to entertain you while you reload.
4. The artillery is too precise, thus not realistic at all. They get a top-down satellite view and there is no skill involved. Of course, the damage they deal is uncanny. Once another tank sees you, the artillery gets an exact fix of your position, and not only that, but a top view of what you are doing, live.
This is an overall reasonably good game that needs a lot of polishing.