I bought this thing a while ago and just now remembered to use it.  I was wondering if the spaghetti would stick together but it was just about perfect.  I say just about because I near ruined it by using nearly the same amount of salt that I would have used in a big pot of water.  Mistake!  Nearly all of the water evaporated or was absorbed by the pasta.  The handy strainer lid drained the remainder off easily.  The salt stayed behind.
Fortunately the sauce needed more salt so it nearly balanced out. The sauce was the last of that stuffed pepper soup that I reduced for a while as the spaghetti was cooking.