I love this assault mech. Tried it for the first time yesterday, it is literally the harbinger of death when you use it (and it's AECM ability) in concert with teammates.
I got in a huge battle on the airstrip with about 5 other teammates against a myraid of heavies, meds, and lights on the enemy side and lasted quite a while and could destroy/heavily damage quite a few of the enemy team while "radar cloaking" my teammates with AECM.
Biggest weakness is the arms, take out the rac5's and the power of this beast is suddenly much less and better suited for a support platform. Couple with it's pretty decent speed and double LAMS makes this mech the ultimate support "tanking" unit.