The game takes the components of Monster Hunter and Dragon Project and blends them fairly well together while also adding some new things as well. 

I can't wait for an English version to come out, thankfully you can play it here in the States if you just use the Quest NPC Auto Pathing (there doesn't appear to be Auto Play, yay!). 

The game runs extremely smooth on my kinda old phone. I was quite impressed with that!

As for the bad, it does appear to have a energy/stamina feature as each mission I went on I noticed a counter go down (with a 20min timer beside it) after I completed a mission. It started at 60 so it seems fairly decent, but depending on drop rates etc this could be a rather annoying thing and probably another microtransaction point.