EAS Simply Protein recommends 2 scoops (20 g) per serving. Personally, I use 4 scoops at a time (40 g).
I would always recommend you do one of two things:
1. Mix the protein with a fiber and fat (peanut butter, flax, blueberries) to slow the digestion of the protein.
2. Mix the protein with a high-GI carb to create an insulin spike, which in turn will drive the aminos into the muscle cells. (Often recommended as a post-workout shake.)
By taking the protein with just water or milk, the protein will be converted to glucose in the liver and create an insulin spike (which will thwart the fat-burning process).
And as far as whey being a good/bad protein, you should always vary your protein sources to maximize the potential of amino absorption. (The alternative is to try a 'protein specific' diet which you would utilize only one type of protein for a period of time, then switch the protein source for a period of time, then switch the protein source, etc. This is still a relatively new concept, so experimentation is required.)