First of all, This is fun.
I believe, breaking down all the aspect from the game is already being done by other content creator. So, i'll straight to the point..
It's vast gameplay, attractive character (which called as 'knight') quality, and each knight's development is fun to learn. Don't forget the unlimited reroll for the first time tho, that's a huge point as it is.
But sadly, Since There are so many other tactical rpg out there, Let's mention Archeland, and the upcoming FG:Exile, don't expect too much from this one. Only if you into old school graphic tactical rpg, i recommend this game worth a try.
For the devs, Have a good one!