5 stars: Dev seems to be updating the game with meaningful changes at least once per week. The game itself is super addictive, monetization is fair, especially the further you get, but it does ultimately amount to an idle power grind. Act 1 (first few hundred levels) is a fun defense game, act 2 (500+) is an idle game with some long term progression, but how willing you are to grind will depend on how much fun you've had up to that point.
5 stars: Super fun. Yes there is a premium currency but so far I haven't felt pressured to use it. Game gives you the option to double your rewards every round if you watch an ad, which isn't too bad. You can even double your weapon crate rewards which is nice. Bottom line is the game is exactly what you'd expect, but done correctly and stylishly. Definitely recommend.
5 stars: Excellent and very generous with gems (premium currency). Has potential to be one of the best mobile defense games out there with the upcoming updates. One suggestion is to make Dungeon mode a bit more interesting, seems like the same waves over and over again.
5 stars: Game is amazing. Compared to most of the other ad riddled games, this game is completely different. Ads are completely optional and give great boosts. Not to mention the very real feeling of getting more powerful every reset. One gripe is that tinker's construct elixer skill doesn't work properly with some weapons, which is quite annoying since I sinked alot of elixir into it.
5 stars: ...