Absolutely Bonkers on how they did stuff.
Pros:
Other people have already started about modes, but there one more niche thing in there weapon customisation. That's so in depth no other mobile fps did it. You could enjoy a while day of just customising weapons and no matches and will still enjoy it.
Cons:
The only issue is optimisation. They need to do more optimisation it lags and eats up battery way too much. I am using SD8G3 so it's ok. But slightly lower end devices may struggle even on medium settings.