Well, my point of view is that thing ( I can't really call it a AT Weapon) is quite useless...
Why ? for the few reasons below..
1- Muzzle velocity is too slow, 54m/s is very slow (hockey player can shoot theirs pucks at this speed, I know what I'm talking about, I've played in the Quebec Junior AAA hockey league for 3 years as a winger, we are able to deflect pucks of this speed, you can see it coming at you and still have time to duck for cover or place your stick to try to deflect the puck in the net...a M72 LAW is around 200m/s in comparaison) It's too slow to be accurate, I mean that if you're trying to shoot a target at 50m, it will take around 1second of travelling before the round hit the target,and if it's a moving target, except if you're shooting from the front, the rocket will miss.
2-Penetration really not enough... 100mm at 65 degree... I don't think it's 100mm composite armor, it's more something like steel, and believe me, in ours days, 100mm of steel is nothing compared to most modern armor (a M72 LAW's penetration is around 350mm and it's found unsuitable against modern armour).
3-By my experience... I'm a canadian reserve soldier with a recon specialist qualification, I've been trained with the M72 LAW and the M2 Carl Gustav recoiless rifle, AT weapon are not easy to use, it's really not simple as just aim and shoot, it's a bit more complicated, that's why it's hard to hit target with... I don't think that a soldier on a battlefield with the stress of battle can really hit something with... It was already hard enough for my squad in exercise with MILES laser to hit target with a Carl Gustav (people will agree with me that the Carl Gustav is a great and proven weapon i think) without getting killed, so imagine with a riduculous handgrenade-like weapon with which you can't even aim... forget about it....