Let me first start by saying that I am NOT an advocate of doing pushing and pulling movements together. That being said, Chest together w/ shoulders has to be one of the worst ideas around. I am speaking from experience of course. The other day as an experiment, my partner and I tried this workout and i was horrible. We started with chest first then shoulders. When it came time to do shoulder presses I could only do 1/2 the weight I normally could doing shoulders alone. Why do this? Why would anyone who is trying to gain muscle have one of their bodyparts suffer at the expense of another? In this sport that is very counterproductive. ALL MAJOR BODY PARTS SHOULD BE DONE BY THEMSELVES. If a smaller bodypart is added like tris/bis to a back or chest workout thats fine, but not two biggies together.
I consistantly see workouts posted on here where Chest/shoulders/tris are done in the same day. Does this make sense? I answer NO. In fact, in any application this workout does NOT seem like an ideal way to grow. For all the newbies on this board, my advice is to stick with working major bodyparts alone, period. Not only from a physical point of view, but mentally you will grow much faster and stronger.