I've played Mine Saga long time ago. Overall quality is a bit uneven between four missions of pack. First two are typical warming up exercises for 7-15 min each. First one is mine and second is small manor. Nothing exceptional I can say about them aside from pitch-black darkness in first mission.

The real meat of campaign is the third mission, set in mountains. It is the biggest one, and took half of playtime spent on entire campaign. It has several locations of interest - Hammerite compound, some fort, caverns and mage tower. I like how open, interconnected and variative it is and there is also Calendra's Legacy-style Event which can significantly change the gameplay. I had lot of fun with this one. And last mission is small city adventure. While I like Antimatter_16's Precious, Working Late and Elemental Excursion, his recent, - which are similar in style, that last mission was a bit too convoluted with hunting for obscure hidden keys and has steep loot goal.

In general, not bad campaign, but uneven. If you are looking for small but intricate missions, it is not bad choice, though I prefer other missions from this author.