Is XM57 toxic?

What is your take on this kind of a vehicle? Do you think that this tank is unfair and unbalanced to play aginst in tier 6-8 tanks? Like in BZ-176's levels of unbalanced. Or it is just "okay"?

What is your take on this kind of a vehicle? Do you think that this tank is unfair and unbalanced to play aginst in tier 6-8 tanks? Like in BZ-176's levels of unbalanced. Or it is just "okay"?