It could be a great game, wonderful mechanic, but for new players it's just a road to and through hell. If You're not going to pay A LOT - You'll surely lose a patience after few days of intense gaming. I got to level 26 and became really upset as I couldn't win any of my matches, no matter campaign or against other player's squad. Almost every enemy chosen for me was 50-60 points higher and that's a really huge gap. Trying to fight 10 times with same opponent and losing is so frustrating... I even got guild wars reward for place 120 and it helped for about 5-10 fights and then enemies got even harder. Especially that making a tier 4 unit requires a lot of time and all enemies have them... I just deleted game from my phone
 "Global Assault"){kind=icon}
 "Frozen Islands"){kind=icon}