The gameplay is good, but the in app purchases are outrageous! Every time a gun goes on sale, it is always just a little bit more expensive than your balance of gems or coins so that you have to buy more to purchase the weapon. If you have enough coins to buy a gun that is 50% off, then they don’t put that gun on sale for you. I play the game often, and have built up a good amount of the in game currency (I have not purchased anything), and instead of giving me sales on items around my tier, they put items several tiers higher than mine on sale to get me to buy their products. Not once have I seen a fair sale on a low to mid tier item. Sales are also personalized based on how many gems or coins you have, so no one item goes on sale for everyone, except for the high tier items. Essentially, the sales are nonexistent, and are simply a ploy to get players to spend money. The progression also has some flaws, the primary section of each city is too short, and the same type of missions are repeated several times throughout the game. I also have some issues with the energy system, there are far too few energy segments for a game of this nature, especially since each mission is quite lacking in length, unlike most other shooter games. Overall, unless you are willing to pour absurd amounts of money into the progression of this game, I recommend finding another game of this nature. I will continue to play this game and if anything changes, I will update my review.