I believe you have to be nominated under the SINP Express entry stream for that 600 points. Otherwise, you'd have to go through the old snail paper mail applications
It depends, if you are TFW under LMO it's perfect. Otherwise OWP people PGWP, ICT, IEC it sucks because many benefits for being in Canada is wiped out. (certainty of eligibility under CEC)
It's even worse for SINP-EE because it give so little emphasis in people already in Sask. (5 points only for people who studied and worked, come on)