What's everyone's thoughts on them?
Personally I'm very on the fence with them. They have power with the jam and deplete effects, if they nail someone that needs, say a lock to do an effect it can be great, as well as taking making an opponent spend focus to avoid it as they'd rather keep for an attack (and would lose it anyway if it hit). On the negative it's going to thwack 'relatively' harmlessly off shields, and even landing it on an unshielded target, and putting the crit on, doesn't seem as good as say... a 3 or 4 die attack.
With that in mind, I think they are perfect for high Init ships, and less valuable on the lower end. (Though I played a friend that used an M3a swarm with them that kept me from ever just 'keeping' a lock on something. ) I'm thinking if you don't mind your I6 starting the fireworks with a love tap as opposed to a haymaker it's not to bad, especially if you can then follow up with oh say...a bunch of passive, concussion S/Fs.
Still I'm personally torn. I want lots of red dice right out of the gate and take ships out before my opponent can even shoot in the Init order.