So, I'm in the middle of the campaign, and I'm sharing my first impressions:

1. The towers and their possible boosts are working together well and allow for a multitude of strategies.
2. Map layouts are really cool.
3. So far, the story which is being narrated by the voiceactors is somewhat convoluted; fortunately, you can ignore it without consequences.
4. Controls are great, game is immensely fun.
5. The possibility to select a difficulty level, from Easy to Elite, is great - you can find your own level and stick to it, or change it between missions.

So far: Recommended!

So, I'm in the middle of the campaign, and I'm sharing my first impressions: 1. The towers and their possible boosts are working together well and allow for a multitude of strategies. 2. Map layouts are really cool. 3. So far, the story which is being narrated by the voiceactors is somewhat convoluted; fortunately, you can ignore it without consequences. 4. Controls are great, game is immensely fun. 5. The possibility to select a difficulty level, from Easy to Elite, is great - you can find your own level and stick to it, or change it between missions. So far: Recommended!