I am a fan of WMS. I feel it greatly increases my recovery and glycogen replenishment. I catch a killer pump after my post workout shake.
There are other alternatives though.
A lot of big strong guys could give two shits less about a PWO shake. I have a couple of PLing buddies who usually hit the buffet after training. No PWO shakes for them. They are jacked too.
As long as you are eating a good meal high in protein and complex carbs before and after training you should be good to go imo.
I think it was Justin Harris who said, "If guys worried about all their other meals 10% as much as they worried about their PWO shake, then there would be a bunch of big strong mofos in the gym." He actually sells a PWO porduct too lol.