<p>I don't want to sign up and end up being in a room of like 2 people?</p>
<p>too early to tell - Decals are used by some to fill their schedule with extra units, but they first need to see how waitlists work out and what they think of the first week of some classes. If you are really concerned, you can always drop it without penalty when you show up for the first session.</p>