Three bosses in so far.
Combat in general has the same balance philosophy as Recettear in that you can gear for really good magic defense or really good physical defense but not both at once, so dodging damage entirely is always top priority because taking hits hurts. The jump dodge is pretty nice for that, fortunately. Combat also got much more satisfying once I unlocked three-gem spells, which are deliciously dangerous and feature an invaluable heal.
I'm still not sure what the trick to the first boss is (has to do with the gems, but god knows how you're supposed to dodge that leap). The next two were very satisfying to figure out and beat. Being able to just run straight through the dungeon to get back is also a welcome design decision.
Gear is awfully expensive now though, and your cash intake doesn't seem to increase much over time (money also despawns much too quickly for my tastes). The auto-collect item is nice, but then it takes up a precious inventory slot. The effect of new gear is immediately noticeable though, so that's nice.
Another fun thing is that the environments do occasionally contain secrets. If you find a silver enemy, kill it and a treasure chest spawns. There's at least one instance where getting to a semi-hidden spot reveals a chest as well.