I've found them to be so up and down.
The dogs are strong but having a quad on one model is terrible.
The juggernauts not being able to cross lots of terrain is punishing.
Speed 4 bloodletters at t3 is rough, but 70 points is good.
They don't have any standout abilities and require lots of intelligent play.
Ive found models that are 3/6 or 4/8 damage are almost necessary to have a great army