Gave it a real try. Got premium version for free during sale. Even with all the free gems and perks provided, I still only managed to upgrade the 2nd and 3rd ship to S rank. Never unlocked any of the other ships let alone the drones that fly with you. I can't imagine how much of a grind fest this game must be without premium perks. I managed to get up to VIP level 3 status without paying a cent and it still isn't worth playing. If you paid for premium, you were ripped off.